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VLM 250 - ASTECH Angewandte Sensortechnik GmbH

1. Connection 4 signals optional Connection 1 programming Connection 2 signals Connection 5 signals optional Connection 3 power supply Earth screw for grounding Fig 6 VLM 250 device connections 6 1 Power supply and grounding The standard VLM 250 model is designed for 230 V 50 Hz AC power supply 24 V DC 20 30 V or 115 V 60 Hz AC power supply are available as options The power is supplied through device connection 3 A mains cable with removable grounding contact connector is included in the delivery in Germany All terminals in the cable connectors can be screwed except DSUB9 at the programming cable The user should perform the cabling according to the appropriate regulations Before connecting the VLM 250 to the power supply a connection has to be made between the grounding screw and the device holder with the aid of the grounding cable included in the delivery The device holder also has to be low resistance earthed A Missing or insufficient grounding of the measuring device can cause malfunctions or damage to the electronics in case of surge ASTECH 2009 Page 19 VLM 250 User Manual Connection 6 2 Signalling lines The device contains a connection card AB3 with screwed terminal as standard and an optional interface card IF1 IF2 and others with screwed terminal which are accessible after removal of the casing cover Prior to opening the casing always disconnect the device from
2. If the alignment tolerance is exceeded a measuring error can occur ths Cause Movement Optional linear units continue to in Z Direction La allow an adjustment in the case of changing material distance LJ1 for an axis or for round surfaces such Gauge Movement in Y Direction i z as e g pipes wires and profiles LJ2 ASTECH for two axes VLM 250 I z wee lt li il i Working Distance Moving Object Fig 4 VLM 250 with LJ2 linear unit ii A tilting by the velocity vector is possible when using the MP3R mounting plate This does not result in a vectorial measuring error The tilting is necessary in the case of measurements on highly reflective materials and some plastic surfaces Working Distance Moving Object Fig 5 VLM 250 with MP3R mounting plate An optimisation of the alignment by means of the Test command in the case of reflective and domed surfaces is useful following connection of the power supply the programming cable and a PC Here the measuring rate output value should take the greatest value ASTECH 2009 Page 18 VLM 250 User Manual Connection 6 Connection The VLM 250 is equipped with screwable device connections There is an earth screw a connection for the programming interface a connection for the signalling lines inputs and outputs and a connection for the power supply Two additional signalling line connections are optional
3. 0 ZDdDua un 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Design of the VENDA dia 10 Working distance see rating plate and alignment relative to surface 17 Alignment to vector of velocity 5 ccciscsscasnsesecatasdssaccvensdends sncsensadessdedesnseanen 17 VEM 230 with El2 linear Unities ds 18 VLM 250 with MP3R mounting plate ooococnnoccconcccnonaccnonnncnnoncnnnnncconnnnnnnns 18 VLM 250 device connections aiii 19 ABS conection Cdi 21 General design of AB3 connection board oocooccnnnccnocanoncnonnnonancnoncnonccnnncnnnoo 22 Wiring example for the outputs of the ABB ooooonoccnnccnccnnocononccannnnnnnonnnono 23 Wiring example for the inputs of the ABB ooooonconnccninconocccooncnoncnannnonnnonnnonos 24 IFlint rface card sip ic ii 23 Principle IF1 RS422 circuit diagram with analog output option 25 F2ante rfac card Soronen et i s eSis 26 Principle IF2 circuit diagram with analog output option oooccooccccoccccnonnninns 26 IF2 PP interlace Caria a 27 Principle IF2 PP circuit AAA A A eS 27 TPO BIS interface Cardo iii 28 Principle IF2F 5V circuit diagram with analog output option 29 Principle IFPROFI circuit diagram 0 0 0 eee ceeeeseeesseecseeceeeeeeeeesseecsaeeneeeees 30 EC CD interlace Card pac rine ent gah eeepc esate a era 31 Principle ECC1 circuit diagram with RS485 option eee eeeeeeeeeeee 32 VEM 230 WANG WS ss slds 34 Light source Cheer
4. 9 5 Output via serial interface 1 9 5 1 The S 0On command This command switches the data output at the serial interface on or off The data output is interrupted during command input and processing Syntax S1On n n 0 off 1 on 9 5 2 The S Format command Apart from programming the serial interface 1 can be used for the output of data The transfer format can be preset within wide limits Data is output in ASCII format The individual parameters can be separated either with commas or space characters However the separators between the parameters may also be omitted Syntax S1Format s s parameter string max 32 characters Parameter Meaning V Inserts the velocity in m s L Inserts the length in m L x Adds the offset x to the length and inserts it in m especially used for individual part measurement with the LBC2 assembly N Inserts the status of the object counter vil Inserts the string enclosed in apostrophes a x n m Formats the value a V L R multiplied by x as a figure with n digits and m digits after the decimal point 3 a x H n Outputs the value a as a hexadecimal figure with n digits Nn 24 Bit velocity sign 6 nibble hexadecimal output decimal 123456 means 1 23456 m s lt SPACE gt 12 Bit measurement rate 10 3 nibble gt like S additionally error number 2 nibble Inserts the current date e g 31 12 99 only for units with RTC Inserts the current time e g 12 50 28 only
5. Remarks Default password WEGA Interrupts the measurement Interrupts the measurement Interrupts the measurement Stops the measurement power down the light source With password protection interrupts the measurement for a short time Take advantage of the program VLMTERM instead of the command Page 68 VLM 250 User Manual Appendix 10 2 Programming examples Print protocol A production company cuts steel plates A VLM 250 measuring device with optional laser light barrier and real time clock is used for the final control A print protocol is to be generated containing date time consecutive numbering with factory identification number and plate length A light barrier is connected to the IN2 input trigger input and the beginning and the end of the plates are detected A printer with serial interface is connected to interface 1 of VLM 250 after programming Trigger 0 Individual part measurement SlInterface 9600 N Baud rate of printer no protocol S1Output 1 Output at plate end Trigger SlFormat D C N 6 KWI L 8 3 Output of date time counter length S1On 1 Switch on Store Save with password input Table 26 Programming example for a print protocol The abbreviated form without space characters can also be entered for the format specification S1Format D CN 67KWI1 L 8 3 Pulse output A wheel with shaft encoder is to be replaced The shaft encoder produced 2 pulses per millimetre Due to the
6. The RS 485 interface serves to transmit data over great distances The interface allows only semi duplex operation i e only one party can send at a time A maximum of 32 parties can be connected Serial data is transmitted as voltage difference between the 2 wires of a cable RS 485 physical transmission parameters Maximum cable length 1200 m depending on cable type and transmission rate Maximum send level 5 V Minimum send level 1 5 V Minimum receive level 200 mV RS 485 load resistance 120 Ohm each on both cable ends termination and a receiver open circuit fail save switch In the case of the VLM 250 the S2 interface can be operated as an RS 485 It is used for the transmission of measuring values If other parties are sending the VLM 250 must be controlled by the XON XOFF protocol or via the trigger input trigger synchronous output ASTECH 2009 Page 78 VLM 250 User Manual Appendix 10 10 Installation drawing 360 0 gt ri 7 90 0 p j 36 0 E yf A 92 5 152 5 202 5 Holes for M6 mounting screws 160 0 340 0 110 0 192 5 142 5 optional Lamp Window Lens Window Laser Ligt Barrier E WD 30 0 Working Distance WD Object Surface AOS O OOO ONO optional Laser E WD Sa AA VLM 250 Gauge for M
7. User Manual VLM 250 Firmware version 7 Version 2 1 Angewandte Sensortechnik VLM 250 User Manual Notes Notes The information contained in this manual has been thoroughly researched and prepared Nevertheless we cannot assume liability for omissions or errors of any nature whatsoever We would however be grateful for your comments or suggestions We shall not accept any claims for damages except for those resulting from intent or gross negligence As this product is available in several designs there might be deviations between the descriptions and instructions in hand and the product supplied We reserve the right to make technical changes which serve to improve the product without prior notification Thus it cannot be assumed that subsequent versions of a product will have the same features as those described here Registered trade marks are the property of their manufacturers VLM 250 User manual V2 1e Copyright ASTECH Angewandte Sensortechnik GmbH Rostock 2009 VLM 250 series from hardware version 2006 with FB2 firmware version from V7 5 Printed 13 August 2009 ASTECH GmbH Schonenfahrerstr 5 D 18057 Rostock Germany Internet www astech de e mail info astech de Phone 49 0 381 44073 0 Fax 49 0 381 44073 20 ASTECH 2009 Page 2 VLM 250 User Manual Contents Contents 1 Introduction A EA On EO EES 9 O A baa sesh eek Es Is ea es OAR 10 Zo Physical principle a tics 10 AS
8. In the case of an analog output optional IF1 IF2 interface card with AI option an analog current can be output A digital analog converter with 16 bit resolution is used The range for the output of measuring values is set by the ANMin and ANMax commands ANMin determines the value at which the minimum current value is output ANMax applies accordingly to the maximum value Example with ANMin 0 and ANMax 1 the following parameters result NOS tm f Oms 0m o 1000 Table 12 Example of analog output ANMin 0 and ANMax 1 If the current measuring value is less than ANMin the lowest current value is output if greater than ANMax the highest current value is output In the case of a missing measuring signal the lowest value is output The output is updated either after reaching Average or after a trigger event refer to ANOutput command 9 2 1 The ANOn command This command switches the analog output on or off Syntax ANOn n n 0 off 1 on 9 2 2 The ANMin command This command allows for the setting of the minimum value for analog output Syntax ANMin n n 230 103 230 10 3 9 2 3 The ANMax command This command allows for the setting of the maximum value for the analog output Syntax ANMax n n 230 103 230 10 3 for ANMAX if e g the device is assembled in the opposite direction to the direction of A Depending on the individual direction it can become necessary to set a negativ
9. e g 4 to 20 mA are not possible If e g the value to be output exceeds ANMAX the maximum current value is output ASTECH 2009 Page 50 VLM 250 User Manual Programming 9 3 ECC control A monitoring of the measuring rate and the velocity with hysteresis can be realized via the ECC control The ECC control represents an extension of the measuring rate monitoring with the Minrate command It is required when using the ECC2 interface card or the external ECC1 switched over device The ECC2 card or the external ECC1 device allow the connection of an external shaft encoder or a second VLM 250 velocity measuring device When falling below the value of a selectable velocity or measuring rate the pulse output is switched over to the shaft encoder or the second measuring device The switch back occurs when velocity and measuring rate are again greater than further values that can be set Velocity and measuring rate are observed after reaching the average time Average parameter The switch over occurs via the status signal The status output OUT3 being updated every 10 ms If the Holdtime has expired the status signal is immediately switched When using the ECC control Average should be set to 10 ms in order to ensure a fast switch over 9 3 1 The ECCOn command This command switches the ECC control on or off When activating the ECC control the measuring rate monitoring is automatically deactivated refer to Minrate command
10. especially quickly processed by the command interpreter All read commands are entered with a letter and executed according to the following CR OAH The value is output with fixed formatting see below and terminated with CR LF ODH OAH Comm Return value i Decimals Example and V Velocity 5 1 23456 L Length 4 1234 5678 R Measuring rate 0 45 N _ Object counter 0 123 F Frequency of the last burst 2 1234 45 Table 15 Read commands The Start command can be abbreviated by the letter S in order to start a new length measurement ASTECH 2009 Page 58 VLM 250 User Manual Programming 9 9 System commands AN During the execution of the system commands the actual measurement is interrupted 9 9 1 The Password command The system command Store is protected by a password which can be changed by the Password command The password consists of up to eight characters including upper and lower case letters figures special and space characters which are represented by asterisks when input By inputting a single asterisk the password protection is deactivated The input can be aborted with ENTER before inputting the first character Three failed attempts to input a password will result in the message Illegal use 60 seconds must then elapse before the next command is accepted When entering the password no distinction is made between upper and lower case letters The factory set password is WEG
11. special models available ASTECH 2009 Metallic and glowing surfaces Universal Metallic and glowing surfaces Difference measurement Metallic and glowing surfaces Universal Metallic and glowing surfaces Universal Metallic and glowing surfaces Difference measurement Metallic and glowing surfaces Low velocity Metallic and glowing surfaces Low velocity Metallic and glowing surfaces Difference measurement at low velocity Page 15 VLM 250 User Manual Technical Data 4 Technical data Velocity range a Working distance 2 Length measuring range internal Detector measuring principle Lighting Programming interface 3 Opto isolated outputs 3 Function Frequency for pulse output Type max output current Opto isolated inputs 3 Function Voltage level Input current Power supply Power consumption Temperature range Protection type Weight EMC Dimensions without connections a Options 0 008 to 50 m s corresponding to 0 5 to 3000 m min depending on individual device type 170 185 or 240 mm depending on individual device type lt 1m 200 km except with F and S series CCD sensor spatial filter White light LED older devices with 10 W halogen lamp RS 232 opto isolated OUTO OUT1 OUT2 OUT3 OUTO Lamp OK OUT1 OUT2 Pulse output with 2 phases shaft encoder emulation OUT3 Signal status 0 4 Hz 25 kHz 2 phases
12. 0 1 0 1 0 1 0 1 0 1 0 05 0 1 0 1 0 05 ISO 3534 Repeatability lt 0 05 lt 0 05 lt 0 05 lt 0 03 lt 0 03 lt 0 03 lt 0 03 lt 0 03 lt 0 03 in range 185 7 5 mm 185 7 5 mm 185 7 5 mm 240 7 5 mm 240 7 5 mm 240 7 5 mm 170 5 mm 170 5 mm 170 5 mm Distance range 185 7 5 mm 185 7 5 mm 185 7 5 mm 240 15 mm 240 15 mm 240 7 5 mm 170 7 5 mm 170 7 5 mm 170 7 5 mm Internal length range 200 km 200 km Extended velocity range 8 to 800 m min 8 to 3000 m min 8 to 3000 m min 4 to 800 m min 4 to 1800 m min 4 to 1800 m min 1 to 100 m min 1 to 100 m min 1 to 100 m min in m min Extended velocity range 0 14 to 13 3 m s 0 14 to 50 m s 0 14 to 50 m s 0 07 to 13 3 m s 0 07 to 30 m s 0 07 to 30 m s 0 016 to 1 7 m s 0 016 to 1 7 m s 0 016 to 1 7 m s in m s Extended distance range 185 15 mm 185 15 mm 185 15 mm 240 30 mm 240 30 mm 240 15 mm 170 10 mm 170 10 mm 170 10 mm Accuracy in extended 0 2 0 2 0 2 0 2 0 2 0 1 0 2 0 2 0 1 range Averaging and updating gt 8 ms gt 2 ms floating gt 2 ms floating gt 8 ms gt 2 ms floating gt 2 ms floating gt 8 ms gt 2 ms floating gt 2 ms floating synchronisable synchronisable Optional automatic yes yes yes directional detection Material Application Metallic and glowing surfaces Universal Table 2 Device models part 2 VLM 250 Parameter DIRECTION 4 8
13. 2 VLMTERM File Commands Extra Help UTTIS QAQXVR nog Online C Offline Setup COM Port Settings Port COM1 Baud rate 9600 x F COM1 9600 8 None 1 Software Fig 24 VLMTERM program If the settings of the serial interface correspond to those of the terminal program the VLM 250 responds with the following display after switching on VLM 250 C by ASTECH Rostock ROM DATE S N Option Board gt If data transfer is switched on at the serial interface 1 refer to S On command this information will be suppressed The details can however be called up at any time with the Info command The connection has been made to the device and programming can begin Commands can be entered in abbreviated form Input as many characters as necessary to make the syntax unique The VLM 250 does not differentiate for commands between upper and lower case letters Parameters are separated by space characters Figures before and after the decimal point are separated by the decimal point If the command is called without an optional parameter the current value of this parameter is displayed All commands described here are listed again in the appendix The default value specified there may already have been adjusted ASTECH 2009 Page 37 VLM 250 User Manual Programming During the processing of most commands the actual measuring function is interrupted or delayed and the data transmission to
14. 21 Principle ECC1 circuit diagram with RS485 option Note When using the IF1 IF2 or IF2F interface cards the function of the ECC2 interface card can be realised by the ECC1 designed as an independent device IP65 The ECC1 allows the above described switch over function and additionally provides a power supply of 24 V e g for the shaft encoder The ECC1 is controlled by the OUT3 status output ASTECH 2009 Page 32 VLM 250 User Manual Operating Instructions 7 Operating instructions The VLM 250 operates autonomously after programming and requires only very little maintenance If need be the maintenance is limited to the cleaning of the windows and the replacement of the halogen lamp see chapter Maintenance During operation the Test and Error commands can be used for diagnostic purposes see chapter Programming The different modes of operation are indicated by LEDs with the following meaning LED Colour Meaning Signal LED green Signal exists or is good see also Minrate and ECCOn Signal LED red Signal does not exist or is below the defined threshold see also Minrate and ECCOn Signal LED __ yellow Device is being initialised standby and offline measuring Flashes briefly in the case of a critical error refer to appendix Table 5 LED signals Signal LED In the case of a moving measuring object and adequate signal quality the LED is green A red LED indicates a poor signal quality A
15. and try again boot jumper for this gauge gauge Table 32 Errors of the boot loader ASTECH 2009 Page 71 VLM 250 User Manual Appendix 10 4 LED signals LED Colour Signal LED _ green Signal LED _ red Signal LED _ yellow Busy LED yellow Command processing also during calibration and offline measurement Error LED red Flashes in case of E40 to E42 fatal errors Flashes briefly in case of E10 to E32 critical errors Table 33 LED signals 10 5 Output value units Parameter i Value range for output Max resolution 21474 0 0001 214748 internal 360288 0 0001 Object counter 1 Stiick 0 65535 1 Measuring rate 0 1000 0 1 Table 34 Measuring values with units and resolution Without format specification the value is output to the S1 and S2 output with three digits after the decimal point Hexadecimal output is made with maximum resolution Without format specification the value is output to the S1 and S2 output without decimals Hexadecimal output is made with maximum resolution ASTECH 2009 Page 72 VLM 250 User Manual Appendix 10 6 Pin assignments 10 6 1 Device connection 1 RS 232 Pin Colour Assignment internal 1 brown RxD RS 232 interface S1 2 white TxD RS 232 interface S1 3 blue GND RS 232 interface S1 4 black GND test signal do not use 5 grey Test signal analog signal 50 Ohm do not use Table 35 Device connection 1 RS2
16. for units with RTC Inserts the measuring rate Inserts the exposure 0 to 14 or OVER as in Test command Inserts the number of bursts since the last trigger event Changes the end identifier of the output string from CR LF to str Inserts the temperature in C Inserts the last error number see also Error command KCI WM AIOIO N Table 13 Parameter for output formatting at S1 3 If no positions are specified in the case of a numerical output length and velocity are output with three digits after the decimal point in the standard unit refer to appendix All other values are output without digits after the decimal point 4 The hexadecimal output in a H n format is output with first a sign character minus sign or space afterwards n decimal digits Every byte needs two decimal digits Without parameter n 9 characters are output for 4 bytes and the sign character 32 bit number Leading zeros are not suppressed 5 The special format S realises a fast output of velocity and measurement rate ASTECH 2009 Page 54 VLM 250 User Manual Programming faster than 50 ms refer to S Time as the conversion in hexadecimal digits requires A The hexadecimal output should be preferred if values are to be output in a time base considerably less calculation time If time base lt 20 ms use only format S Without format indication the output is left justified leading zeros are suppressed except in the case of hexadecimal ou
17. ms 0 950000 1 050000 1 000000 V Velocity L Length 1 65535 0 0001 10000 0 Holding off 1 Control circuits on 2 Pulse outputs on 3 Both on with IN2 4 Pulse an with IN1 hh mm ss dd mm yy 0 forward 1 back 2 external forward low 40 0 3 mA 3 external forward high 5 40 mA 4 automatic option 5 8 see text 10 65535 250 ms 0 off 1 99 on 0 65535 0 No error upon failure 1 Error upon failure Page 64 VLM 250 User Manual Appendix Meaning Test Test command TestAn Test command for analogue output TestPS Test command for the power supply Trig ger Trigger Window Window length F series only Table 17 General commands 10 1 2 Analog output commands Meaning On off Minimum value Maximum value Time or trigger controlled output Value Indicates analog parameters Table 18 Commands for analog output Possible values 0 H level as Dir 1 L level as Dir 2 L H edge 3 H L edge 1 4 8 Possible values 0 off 1 on 230 103 230 10 6 230 10 3 230 10 6 0 Time 1 Trigger V Velocity L Length N Object counter value R Measuring rate Default value Default value 0 000 1 000 V 7 The Test command is automatically interrupted after 60 seconds The parameter C suppresses the automatic abort ASTECH 2009 Page 65 VLM 250 User Manual Appendi
18. n1 n2 nl Measuring time in s n2 Calibration value m s Test command Unit ms Possible values 2 65535 10 ms 0 with S series 0 0001 10000 oo Commands of the F series and S series with different meanings The Calibrate command does not allow calibration via the length only two numerical parameters No length indication is carried out by the Test command Output of length to the interfaces is not possible S7 Format and S2Format ASTECH 2009 Page 63 VLM 250 User Manual Appendix 10 Appendix 10 1 Command overview 10 1 1 General commands Meaning Average Averaging time Set calibration factor Calibrate Calibration c nl n2 c velocity or length nl meas time in s or numbers n2 Calibr value m s or m Holding of control circuits only with individual part measurement and pulse outputs 1 and 2 Chold Indicates and sets clock Clock time Indicates and sets date Direction Direction Indicates the last error Help pages Hold time Info Indicates the software version and the serial number Measuring rate monitoring Sets the part counter Parameters Indicates all general parameters Comments Indicates all parameters Indicates the serial number Behaviour in the event of signal failure or standstill Starts length integration Stops length integration Signalerror ASTECH 2009 Unit Possible values Default value 5 65535 250
19. output channel is updated in the case of a trigger synchronous output see commands ANO utput INCOutput S1 Output ASTECH 2009 Page 47 VLM 250 User Manual Programming 9 1 26 The VMax command The VMax command is used to adjust the maximum plant velocity in m s For optimised operation the value for VMax must be adjusted to the actual conditions To ensure that the automatic adjustments are made accurately it should not be too high or too low Syntax VMax n n 0 01 99 99 m s For proper measuring ensure that the settings for direction made with the Direction command and the maximum plant velocity configured with the VMax command are correct For devices with FB1 filter board command INFO shows no FB2 the maximum frequency of the filter board is issued when new values for VMAX and DIR are entered If the displayed frequency does not correspond to that printed on the FB1 board adjust VMAX until the two frequencies coincide Do not operate the measuring devices at velocities that are above the range specified in the data sheet as this could result in inaccurate readings Please note that the maximum permissible velocity is directly affected by the Direction parameter The Vmax parameter must thus be adjusted to match the actual maximum plant velocity A safety margin of 10 is already taken into account in the device ASTECH 2009 Page 48 VLM 250 User Manual Programming 9 2 Analog output
20. processor It calculates the floating average value weighted according to the signal quality A ring memory with 1 or 8 averaging cycles is used Compared with the VLM 250 A it is possible to achieve a significantly higher update rate whereby the minimum update time of the two outputs is 2 ms The internal calculation of the length and the automatic direction detection is thereby not possible for more details see the chapters covering the F and S series and the notes in the text Due to the high calculation performance the use of the F series is recommended for higher velocities ASTECH 2009 Page 12 VLM 250 User Manual Device Models 3 3 VLM 250 D series The models VLM 250 D and VLM 250 FD are specially designed for applications on metallic surfaces as well as for a large distance variance They realise a working distance of 240 7 5 mm and are distinguished by a high reproducibility of lt 0 02 with a working range of 240 7 5 mm Measurement of velocities of less than 0 033 m s 2 m min is possible The devices of the D series can 1f necessary be configured for a wide range of the distance variance see table 3 4 VLM 250 L series The models VLM 250 L and VLM 250 FL have a working distance of 170 7 5 mm They are primarily used for the measurements of small speeds as they cater for a minimum speed of 0 008 m s 0 5 m min The devices of the L series have an extended working range of 170 10 mm Note A speci
21. resolution 20 ns 2 optional high resolution pulse outputs available see below PNP 40 mA with AB3 with optional AB4 active push pull 24V 20 mA INO IN1 IN2 INO Standby IN1 External directional signal IN2 Trigger signal for signals 0 24 V 0 20 mA or 20 mA R approx 1 kOhm gt 8 V for HIGH for IN1 and IN2 switchable to gt 3 V approx 20 mA at 24 V 230 V 50 Hz optional 115 V 60 Hz optional 24 V DC 20 to 30 V lt 50 W 0 to 50 C IP 65 Approx 5 8 kg Industrial standard in compliance with CE 360 mm x 160 mm x 90 mm e Analog output IF1 4 to 20 mA or 0 to 20 mA 16 bit resolution opto isolated e Different digital interfaces IFI RS485 RS422 RS232 opto isolated e Network connection IF PROFI Profibus DP IF ETHER UDP IP and TCP IP e High resolution pulse output IF2 0 4 Hz to 25 kHz IF2 PP 0 4 Hz to 50 kHz and IF2F 5V or IF2F 422 0 4 to 500 kHz 2 x 2 phases resolution 20 ns e Light barriers direction detection not for F S series real time clock different counters and displays e Mounting accessories linear units protection casing blowing device parameterisable with FB2 through VMax 2 standard design other versions available ASTECH 2009 3 max voltage 50 V DC 36V AC tested by accredited institute Page 16 VLM 250 User Manual Installation 5 Installation The installation is carried out transversally to the direction of movement of the measuring ob
22. the factors for the two additional pulse outputs IF2 interface card series The possible frequency range of the interface card must be observed The additional pulse outputs always output velocity values even if INCValue R is set for example refer to INCValue In this case the measuring rate is output to the standard pulse output OUT1 OUT 2 and the velocity to the high resolution pulse outputs OUT4 to OUT7 From Firmware Version 7 3 the INCFactor value could be also negative This will invert the phase shift of the pulses e g if Direction 1 or 5 is set caused by inverse mounting Example without IF2 INCFactor 1 5 With IF2 INCFactor 1 10 12 3456 ASTECH 2009 Page 52 VLM 250 User Manual Programming 9 4 3 The INCOutput command This command determines whether the output value should be updated after the time interval specified by Average INCOutput 0 refer to Average command or by a trigger event UNCOutput l refer to Trigger command Syntax INCOutput n n 0 1 9 4 4 The INCValue command This command determines whether the velocity or the measuring rate should be output to OUT1 2 Syntax INCValue c c V R A When using the IF2 series interface cards the velocity is output to the additional pulse outputs independent of the set value for INCValue 9 4 5 The PINC command Indicates all parameters of the pulse output Syntax PINC ASTECH 2009 Page 53 VLM 250 User Manual Programming
23. the power supply There are different possibilities for the connection assignment refer to appendix As these assignments can be modified by either the manufacturer or the user they should be inspected prior to connection Only screened connectors and cables should be used for signal transmission device connections 1 2 4 and 5 The programming cable device connection 1 must be removed once programming has been completed The shielding must be earthed always Connectors and cables can be purchased from the manufacturer The device connections 4 and 5 are optional Unassigned device connections should be protected against the penetration of dirt by dummy plugs A The device connections 2 4 and 5 are wired according to customer specifications Please note that they are not reverse polarity protected A wiring diagram is enclosed with every device Some wiring examples can be found in the appendix You will also find more detailed explanations of the individual interfaces there It must be ensured that the potential differences between the output and input signals to the ground conductor PE are less than 42 V It is recommended that the GND cable of the system voltage be connected with the earth or the PE conductor via a potential compensation The protective switches integrated on the connection and interface cards transmit in the case of voltage differences of gt 42 V between the signals or to the ground conductor The deriv
24. 0 Type of protocol No protocol No parity Software protocol Odd parity XON XOFF codes Even parity Table 14 RS 232 interface settings Automatic baud rate detection No parameter indicated If a baud rate of 0 is entered the VLM 250 automatically detects the baud rate after switching on This happens however only if the first received signals is CR 0DH 9 5 4 The S Output command This command determines whether the measuring value should be sent either within a selectable time interval refer to S Time command when a trigger event occurs refer to Trigger command or at each burst Syntax S1Output n n 0 1 2 ASTECH 2009 Page 55 VLM 250 User Manual Programming 9 5 5 The S Time command This command determines the time interval in ms in which the data is to be output to interface S1 During the velocity measurement all values occurring bursts are averaged in the averaging time refer to Average command The data are then output at the same intervals as the time set by S Time Syntax SITime n n 5 65535 Unit ms 9 5 6 The PSI command Indicates all parameters of the serial interface 1 Syntax PSI 9 6 Output via serial interface 2 The serial interface 2 optional interface card IF1 or ECC2 can be used for the output of data in the same way as the serial interface 1 All commands apply accordingly provided that parameter S1 is replaced with S2 The serial interface 2 can
25. 2 examples Only oooonnccnnnnnccn 13 10 6 3 Device connection 3 with 230V AC or 115V AC power supply 73 10 6 4 Device connection 3 with 24V DC power supply 73 10 7 Distributors and assembly instructions for connectors ccconococconcccnoncnonancninnnnnos 74 10 7 1 Cable connector for connection 1 RS232 eesse 74 10 7 2 Cable connector for connections 2 4 a 5 signals IN OUT 74 10 7 3 Cable connector for connection 3 115V AC 230V AC 74 10 7 4 Cable connector for connection 3 24V DC eseese 74 10 7 5 Assembly instructions for shielded connector eee 74 10 7 6 Pin assignment of male and female cable connectors 75 10 8 Order COdes torint rface cardsmore emea es 76 10 9 Description of the serial interfaces ooncocnnncccnnncccnoncccnoncnnnnncnonnnacononcnononaconnnnnns 11 10 9 1 RS 232 interface AB3 IF1 ECCO2 ooooococonicononnnnonac nncconcconncronoss 77 10 9 2 RS 422 interface IF1 422 TF2 422 occccnnninononacnnonccncnonaananonos 77 10 9 3 RS 485 interface IF1 ECC2 or cyulstves cash actqaxcanesasacheadeaetans 78 10 10 Estalla OMA nt aca a a a a 79 TI Dl a tena ted 80 ASTECH 2009 Page 5 VLM 250 User Manual Contents Figures Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig ASTECH 2009 1
26. 32 10 6 2 Device connection 2 signal 2 examples only Pin Colour Digital OUT digital IN Digital OUT RS 485 brown OUT white OUTI Phase A blue OUT2 Phase B black OUT3 Status grey OUTO Lamp OK Table 36 Example of device connection 2 10 6 3 Device connection 3 with 230V AC or 115V AC power supply Pin Cable colour 230V AC assignment 2 brown Phase 3 blue Neutral PE green yellow Ground conductor Table 37 Device connection 3 230V AC and 115V AC power supply MN Bl WPM 10 6 4 Device connection 3 with 24V DC power supply Cable colour 24V DC assignment black 1 black 2 green yellow Ground conductor Table 38 Device connection 3 24V DC power supply Caution Before connecting the power ground the device with the earth screw via the grounding cable 2 Do not confuse the phase and neutral conductor both conductors are protected ASTECH 2009 Page 73 VLM 250 User Manual Appendix 10 7 Distributors and assembly instructions for connectors 10 7 1 Cable connector for connection 1 RS232 Type series Order number Male cable connector shielded Esto B rsig Series 713 99 1437 814 05 Male angled 90 connector shielded Esto Borsig Series 713 99 1437 824 05 Male cable connector metal not Binder Esto Borsig Series 713 99 0437 55 05 shielded Female dual connector not shielded Esto Borsig Series 713 99 0437 142 05 10 7 2 Cable connector for co
27. 3D oononncncnnnnonononenicicncnnonononananacocnnnnononananicinicinos 73 Example of device connection 2 dde 73 Device connection 3 230V AC and 115V AC power supply 73 Device connection 3 24V DC power SUPply ooooccooccccoocccnonccinancnonananonns 13 Order codes for interface cards miii ii dd 76 Page 7 VLM 250 User Manual Contents Notes regarding this manual Commands and functions are in italics Upper and lower case writing is used to improve legibility e g 2On command used to initiate output to the serial interface S2 The abbreviated notations recommended for input of commands are printed in bold print e g SIFormat command for the programming of the serial interface 1 Designations are enclosed in single quotes e g SW1 switch SW1 The following symbols are used n Numerical value S Character string c Character Optional The following abbreviations are used for measurements V Velocity N Object counter value L Length R Measuring rate The following symbols are used to emphasise particularly important instructions AN Caution A Note A Information S VLM 250 F and S series ASTECH 2009 Page 8 VLM 250 User Manual Introduction 1 Introduction The VLM 250 measuring device for velocity and length is suitable for taking measurements on a wide variety of materials The VLM 250 is a very versatile and can be used in connection with many different process auto
28. 4 1 o N g ul 2 A E A DUT5 N D 3 DUT5 2138 DUT6 A Q OF 3 le DUT6 R DUTZ 5 o DUTZ v a BR3 m E 3 BR4 a E Ic ae 2 X603 Q dB REOG x 5 Al ggi for BS g I DUT O ll z N S e Gi TE i d o wb Fig 13 IF2 interface card The four outputs OUT4 to OUT7 are electrically isolated by optical couplers The OUT4 5 and OUT6 7 outputs can be scaled independently NPN transistors are used The necessary external voltage equals 24 V A clock out of phase by 90 is provided refer also to programming of the pulse output OUT4 5 A ___ OUT4 6 TE Optoisol ___ LQUTS o Highres o wa two U e Channel ___ OUT6 E Pulse ES E Outputs ___ OUTE6 SS OUT7 gt ___ OUT7 5 Protection Circuit 0 4 20mA Po gt IOUT O D A Converter ___ LIGND Protection Circuit Interface Board IF2 Fig 14 Principle IF2 circuit diagram with analog output option ASTECH 2009 Page 26 VLM 250 User Manual Connection 6 6 IF2 PP interface card The optional IF2 PPinterface card provides two high resolution pulse outputs each with 2 phases and a frequency range of 0 4 Hz up to 50 kHz Resolution and error each equal 20 ns O ZWNIN dd Z 1 TU E wn pe Cc F F a a c m pol ma T w c 88 2 HI31SY Fig 15 IF2 PP interface card The seven outputs OUT3 to OUT7 are
29. 70 10 mm 170 10 mm Accuracy in extended 0 2 0 2 0 2 0 2 0 2 0 1 0 2 0 2 0 1 range Averaging and updating gt 8 ms gt 2 ms floating gt 2 ms floating gt 8 ms gt 2 ms floating gt 2 ms floating gt 8 ms gt 2 ms floating gt 2 ms floating synchronisable synchronisable Optional automatic yes yes yes detection of direction Material Application Almost all surfaces Universal Table 1 Device models part 1 VLM 250 parameter DIRECTION 4 8 special models available ASTECH 2009 Almost all surfaces Universal Almost all surfaces Difference measurement Metallic surfaces Universal Metallic surfaces Universal Metallic surfaces Difference measurement Metallic and other surfaces Low velocity Metallic and other surfaces Low velocity Metallic and other surfaces Difference measurement at low velocity Page 14 VLM 250 User Manual Device Models VLM 250 A h VLM 250 FA h VLM 250 SA h VLM 250 D h VLM 250 FD h VLM 250 SD h VLM 250 L h VLM 250 FL h VLM 250 SL h Velocity range in m min 4 to 400 m min 4 to 1500 m min 4 to 1500 m min 2 to 400 m min 2 to 900 m min 2 to 900 m min 0 5 to 50 m min 0 5 to 50 m min 0 5 to 50 m min Velocity range in m s 0 07 to 6 7 m s 0 07 to 25 m s 0 07 to 25 m s 0 03 to 6 7 m s 0 03 to 15 m s 0 03 to 15 m s 0 008 to 0 83 m s 0 008 to 0 83 m s 0 008 to 0 83 m s Accuracy DIN 1319
30. A Syntax Password 9 9 2 The Restart command This command releases a cold start The device carries out the initialising in the same way as 1t does after switching on The parameters are reset to the values last saved by the Store command The command must be written out Syntax Restart 9 9 3 The Restore command This command releases a warm start This causes the device to be reset to the parameters last saved by the Store command Syntax Restore 9 9 4 The Simulation command The command serves to simulate velocity and measuring rate to the outputs of the measuring device in the case of synchronous output as of firmware V6 5 It interrupts the measurement The nl parameter must be specified for the velocity The second parameter for the measuring rate n2 is optional Syntax Simulation n1 n2 nl 0 100 000 velocity in m s n2 0 99 measuring rate The following outputs are supported during the simulation pulse output analog output output to interface S2 incl IFPROFI and IFETHER rate monitoring with Minrate and ECC control The simulation is aborted with ESC ASTECH 2009 Page 59 VLM 250 User Manual Programming 9 9 5 The Standby command The command is used to set the device into the standby mode The measurement function is stopped and the light source is turned off The command represents an H level at the input INO lt Syntax Standby The standby mode is aborted wit
31. A O NT 11 Dear interfaces sess o a Ta O es 11 24 CONSUL rd o a AKE A Ea AEE EEE e EEEN E 11 3 Devi MOE ii A A ae os A E age 12 3 1 MAA A othe daie E E Seonaoute 12 320 MVM 250 RSCTICS sc Sieh oe ie eee ss ee ae O ld 12 Far VLM 230 D Seres anita aphstieaiedcdisishisa dekh ana as hbase tole beds 13 34 VEM 250 E Series dad id dias 13 ID PVEM 2S0 SSES dai aia Sexe 13 07 Option tor VEM 230 a nan a a a aaiae 13 3 7 Overview of device designs ida 14 A ena r a a eae debe e a a a eaa 16 oE E o EEE AN 17 Gs CONME COA coin oi Neen are A NA E Ooi NLS Leto tens alee tic 19 6 1 Power supply and grounding 00 0 eeeeceescecesececeeeeecesneeceeneecseeecseeeecseeeeenaeees 19 62 Stealer limes is 20 63 ABI CONNECHION CAL tesi asiatica ies e Meus Sv eee AOS 21 6 3 1 Serial interface Lia iii nd 21 6 3 2 QUT OUtPUtS ius tana 22 6 3 3 Inputs INO TNT ANA INZ ns Ad 23 6 4 Ii AA ON 24 65 gt IB2anterttace card e o dd o e e o e das 26 6 6 IE2 PPunterface Crd sata idilio 27 6 17 TRE2E SV intertace dui tdci 28 6 8 IF PROFI and IF ETHER interface Cald oconnnnonononncnccnonnnnonanonononcononnnnanoncnnnnonons 30 6 92 ECCE2Z Interface Card italia is 31 1 Operating Instructions vi iaa 33 Maintenance A AA E E E E E E os Hales Doi REA E R E 34 SL Wand OWS 0 SAA A RE Rah Ete 34 A NN 35 8 2 1 Actual type with LED cuidas 35 8 2 2 Older type witch halogen lamp esseeesesseesesreeseeeresressessrssresseseres 35 8 2 3 General siii a n aa aa Ea
32. H 2009 Page 13 VLM 250 User Manual Device Models 3 7 Overview of device designs VLM 250 A VLM 250 FA VLM 250 SA VLM 250 D VLM 250 FD VLM 250 SD VLM 250 L VLM 250 FL VLM 250 SL Velocity range in m min 4 to 400 m min 4 to 1500 m min 4 to 1500 m min 2 to 400 m min 2 to 900 m min 2 to 900 m min 0 5 to 50 m min 0 5 to 100 m min 0 5 to 100 m min Velocity range in m s 0 07 to 6 7 m s 0 07 to 25 m s 0 07 to 25 m s 0 03 to 6 7 m s 0 03 to 15 m s 0 03 to 15 m s 0 008 to 1 7 m s 0 008 to 1 7 m s 0 008 to 1 7 m s Accuracy DIN 1319 0 1 0 1 0 1 0 1 0 1 0 05 0 1 0 1 0 05 ISO 3534 Repeatability lt 0 05 lt 0 05 lt 0 05 lt 0 02 lt 0 02 lt 0 02 lt 0 02 lt 0 02 lt 0 02 in range 185 7 5 mm 185 7 5 mm 185 7 5 mm 240 7 5 mm 240 7 5 mm 240 7 5 mm 170 5 mm 170 5 mm 170 5 mm Distance range 185 7 5 mm 185 7 5 mm 185 7 5 mm 240 15 mm 240 15 mm 240 7 5 mm 170 7 5 mm 170 7 5 mm 170 7 5 mm Internal length range 200 km 200 km 200 km Extended velocity range 8 to 800 m min 8 to 3000 m min 8 to 3000 m min 4 to 800 m min 4 to 1800 m min 4 to 1800 m min 1 to 100 m min 1 to 200 m min 1 to 200 m min in m min Extended velocity range 0 14 to 13 3 m s 0 14 to 50 m s 0 14 to 50 m s 0 07 to 13 3 m s 0 07 to 30 m s 0 07 to 30 m s 0 016 to 3 3 m s 0 016 to 3 3 m s 0 016 to 3 3 m s in m s aaa distance range 185 15 mm 185 15 mm 185 15 mm 240 30 mm 240 30 mm 240 15 mm 170 10 mm 1
33. H level Using the switch the H level for IN1 and IN2 can be reduced to gt 3 V required for use of IFPROFD The maximum input frequency may not exceed 10 Hz in the case of a mark space A ratio of 1 1 For F series devices the maximum permitted frequency at the IN2 trigger input is 500 Hz The input signals must be absolutely free off contact bounce chatter The use of relay contacts is not allowed 2 The wiring example shows connections with passive load resistors and optical couplers ASTECH 2009 Page 23 VLM 250 User Manual Connection 24 V INO a INPUT 0 O lt Y KK INO Standby 2 O o OV IN1 OUT IN1 Q push pull Direction Y AK INi OW driver O INPUT 1 IN2 DN Trigger CY rN 1k 24V INPUT 2 Protection Circuit OV Fig 10 Wiring example for the inputs of the AB3 6 3 3 1 Input INO A H level at this input switches the device to standby mode This function corresponds to the Standby command see chapter Commands 6 3 3 2 Input IN1 The input for the directional signal can be activated at H or L level It is programmed with the Direction command The connection of an external directional transducer to IN1 should be given preference over an internal direction detection option FB2DIR 6 3 3 3 Input IN2 The IN2 is the trigger input It is used for the control of the length calculation not F or S series I
34. Signalerror set to 1 the measuring value is marked as incorrect if the value drops below the minimum measuring rate in this case E EEE might be issued see Signalerror command ASTECH 2009 Page 42 VLM 250 User Manual Programming When switching on the ECC control see ECCOn command the measuring rate monitoring function is deactivated with Minrate Syntax Minrate n n 0 off n 1 99 on 9 1 13 The Number command This command sets the object counter to value n Number without parameter returns the counter value Switching off the unit resets the counter to zero Each trigger event increases the counter by one see Trigger command The object counter is used to measure individual parts for the parts count Syntax Number n 0 65535 9 1 14 The Parameter command Lists the current setting of the parameters There are separate commands for the parameter display of the output channels Syntax Parameter 9 1 15 The Readpara command This command reads out the parameter setting of the device The following commands are automatically executed Serialnumber Parameter PInc PAn PAl PECC POff PSI and PS2 The command is used by the VLMTERM program in order to read the parameter values menu option Read parameters The stored parameter file can be used for reconfiguration as the parameters can be written to the measuring devices with the Write parameters command thus facilitating the fast configurati
35. Syntax ECCOn n n 0 off 1 on 9 3 2 The ECCRI command This command determines the minimum measuring rate at which switch over to the external device occurs Common values are 3 to 10 Syntax ECCRI n n 0 99 9 3 3 The ECCR2 command This command determines the measuring rate at which switch back reoccurs Common values are 8 to 20 The value must be greater than ECCRI Syntax ECCR2 n n 0 99 9 3 4 The ECCV1 command This command determines the minimum velocity at which switch over to the external unit occurs Common values are 0 05 to 0 2 m s Syntax ECCVI n n 0 231 10 4 Unit m s 9 3 5 The ECCV2 command This command determines the velocity amount at which switch back reoccurs Common values are 0 1 to 0 3 m s The value must be greater than ECCVI Syntax ECCV2 n n 0 0001 231 10 4 Unit m s 9 3 6 The PECC command Indicates all parameters of the ECC control Syntax PECC ASTECH 2009 Page 51 VLM 250 User Manual Programming 9 4 Pulse output The pulse output provides two clock sequences A and B with a phase of 90 max phase deviation 10 and with a mark space ratio of 1 1 at the OUT1 and OUT2 outputs electrically isolated by optical couplers The phase shift can be controlled by the IN1 directional input or the internal directional identification between 90 or 90 Two additional pulse outputs each with 2 phases A B are optional on the interface c
36. T SLL NS 41 A A A AO 44 Parameters fot TAI A a aaa 46 Trigger PO aia iii 47 Example of analog output ANMin 0 and ANMax I e 49 Parameter for output formatting at SLi eee ceeeeceeeeeceeeeeeeteeeeeeeeee 54 RS 232interface settini S innuna ene e Saapcesta de ceede a e doses 55 Read commands viii 58 Commands of the F series and S series with different meanings 63 General i OME ans uo ete ie ceed ata ieee hid wine 65 Commands Tor analog DU PUL a5 oss lt Ssees cs ssa gen da it 65 Commands for ECC controluaiiinincniid aiii 66 Commands for pulse Utica 66 Commands for serial interface Suc 66 Commands for serial interface 2 67 Commands for serial offline measurement ooooconnnocccnnncccnoncnononanonancnonanacinns 67 AA O E E 67 Systemi commands dd id do 68 Programming example for a print protocol cooconccnnncnocononnnnocnnannconncnoncnnnos 69 Programming example for pulse OUtpUt oooonnococnnocccooncccnonccononcnonananonnnaninns 69 Errors during command input and processing cooocccnoccnonononnnannninanonncnonennnos 70 Errors caused by non correct parameters oococoooccconoccconoccnooncnononononanacinnnacinns 70 Critical errors a Sacred as 71 Fatal errors requiring a check of the device oooooococcooccccoocccnoncnononanonananonns 71 Errors ofthe boot loader roere id 71 PA A II a a a EEEa aesa EY 12 Measuring values with units and resOlutiON ooooonnccnonccnoccconacconccancnonanonnnonns 72 Device connection 1 RS2
37. The S value of Average should be chosen between 2 and 250 ms Common values are 5 to 10 ms 50 to 100 ms for VLM 250 of the L series The Windows parameter allows for a floating average across 4 or 8 values Select Windows 1 to switch off the floating averaging function With devices of the S series it is possible to use value 0 In this case the averaging time is determined by the synchronisation clock at the IN2 input trigger ASTECH 2009 Page 38 VLM 250 User Manual Programming 9 1 2 The Calfactor command This command allows a calibration factor to be entered manually or to be displayed The value of the calibration factor is usually close to 1 Syntax Calfactor n n 0 950000 1 050000 Calculation of the calibration factor based on the length or velocity indicated by the VLM 250 and the actual values Tats chlicherWert AngezelgterWert NeuerKalibrierfaktor AlterKalibrierfaktor 9 1 3 The Calibrate command This command performs a calibration of velocity or length For this purpose 3 parameters must be entered in the following sequence c V velocity calibration L length calibration nl duration of the measurement in the case of velocity calibration in seconds or quantity of objects to be measured in the case of length calibration n2 exact value of velocity or length to be calibrated set value For the calibration only amounts are used 1 e negative velocity or length values a
38. a S 35 A ANH INTL ooze haces 2 ea e E A N N A A 37 9 1 General COmmMANAS 2 AA 38 9 1 1 TheAv rage command nenene i i eee 38 9 1 2 The Calfactor commands ox ceunceaeacinen ansaadteuasanuahe 39 9 1 3 The Calibrate COMMANA cccccccccseceeeessnsececesecseeeesssseceseceens 39 9 1 4 The Chold command atinada iba 40 9 1 5 The Clock COMMANA asnan n a a 41 9 1 6 The Date command sisses eigi kea aiaei ria 41 9 1 7 The Direction COMANDO occcnnnnnoonoonnnnnnnononnnnonononcnnononnanononononccnon 41 9 1 8 The Error COMMANGA coooooonnncncnnnananananonononnononnnnononononcononnanonononononnon 42 9 1 9 The Help COMME A as 42 9 1 10 The Holdtime command ooooooonnnncnnnonnoononnnonocnononannononononcononnnnanonnnos 42 Oded This Ino COMA a li did 42 ASTECH 2009 Page 3 VLM 250 User Manual Contents 9 1 12 The Minrate command oooocoooonnnnncnnnonnnonnnnnononnononnnnnnonnncncononnnnononnnos 42 9 1 13 The Number command ccccccecsessccececcceceesenseceeeceesesessnseaeees 43 9 1 14 The Parameter command c ooooocnncnnnononononnnonocnonononnnnnnnoncononnnnanononos 43 9 1 15 The Readpara command e 43 9 1 16 The REM command ssiri s a eA 43 9 1 17 The Serialnumber command ococccnnnoocoonnncnnononnnnononononocconinnnnanannnos 43 9 1 18 The Signalerror command cooooooccnnnoccccnnnoncnnncnnnnnnncnnnnnnnnnnnnnncnnnnnos 44 9 1 19 The Start command occonnnnnoonoonncncnnonnnnononononocnononnnnononnnoncononnnnanannnos 44 9 120 TRE Stop c
39. able to carry out the replacement in a clean place 2 After disconnecting the unit from the power supply release the four hexagon socket screws and remove the cover of the VLM 250 3 The two connectors as well as the hexagon socket screw see arrow must be loosened The old light source block can then be removed Caution high temperature 4 The new light source block should be inserted very carefully Be sure that nothing gets wedged Do not touch the glass of the new light source 5 The hexagon socket screw should then be fixed and the two connectors connected until they lock together The cables may not lie in the optical path of the lighting unit 6 Close the device properly and then reconnect the power supply f change Illumination unit with LED light source and Illumination unit with dismounted LED mounting screw arrow y Illumination unit with lamp light source and Illumination unit with dismounted Lamp mounting screw arrow Fig 23 Replacement of the light source ASTECH 2009 Page 36 VLM 250 User Manual Programming 9 Programming For programming the VLM 250 programming interface serial interface 1 RS232 should be connected to the serial interface of a PC via an interface cable Install the VLMTERM terminal program for Windows 98 2000 NT and XP from the CD included in the scope of delivery The program operates with 9600 baud no parity and XON XOFF software protocol 9600 8N1 software
40. ailure is indicated by a red signal LED after the hold time has expired LN Normally Holdtime should be greater or equal to Average Common values for Holdtime are 50 to 1000 ms By using the internal length measurement Holdtime must be less than the minimum time interval between two individual parts Syntax Holdtime n n 10 65535 Unit ms 9 1 11 The Info command This command displays the device information with software version and serial number as after switching on the unit The available software options section starting with Option and the detected assemblies starting with Board are displayed Syntax Info 9 1 12 The Minrate command The measuring rate monitoring function can be activated by means of the Minrate command and a parameter greater than 0 Minrate without parameter returns the set value If the set measuring rate drops below this value the signal LED is red and the OUT3 status output is opened see chapter Outputs The Minrate can for example be used to program a dirt check of the windows Useful values for Minrate are 5 to 20 The measuring rate is always monitored after the time set by the Average command In the case of low velocities ensure that the Average is not set too low Note that the OUT3 output is open also in case of a material standstill or if no material is located in the working range Then the signal LED is red If the measuring rate monitoring is activated and
41. al model of the VLM 250 VL with FB2L filter for 0 004 m s 0 25 m min to 0 25 m s 30 m min is also available Apart from the minimum and maximum speeds this model is identical with the VLM 250 FL 3 5 VLM 250 S series Devices of the S series correspond to those of the F series however they also allow the synchronisation of the averaging processor and therefore of the complete system via an external clock signal If two measuring devices of the VLM 250 SD type are controlled by the same clock signal the complete processing of the measuring value of both devices is synchronous to the set clock signal Using this configuration it is then possible for example to carry out highly precise and dynamic differential velocity measurements for further details refer to chapter on the F and S device series The VLM 250 SD measuring devices are distinguished by an especially high reproducibility rate of lt 0 02 for a working range of 240 7 5 mm 3 6 Option h for VLM 250 Based on the previously named devices the h option has been specifically designed for the measuring on glowing tubes wires and profiles in steel copper brass etc The optics of the h series are adapted for use on glowing surfaces The models can however also be used for measurements on other materials Depending on the actual ambient conditions it might be necessary to ensure sufficient cooling e g with CBS cooling and protecting case and ACS air supply ASTEC
42. alanine 36 VEMTERM POT A ceded a A a S 37 Screen text of esconde dd td 45 Screen text of TestAn command ssssseseseeresseseresresseseresressersresreesreseeseresee 45 Active length measurement respectively active trigger signal based on command Trigger and IND Levels 47 Examples of analog OM PU torna 50 Simplified operating principle of the averaging processor with 8 cycles 61 Assembly instructions for shielded connector coooccnncccnocononcnonanonancnananonennnos 74 Pin assignment of connectors for connections 1 2 4 and 5 75 Installation drawing for various designs dimensions in MM oooooccoccnonccnno 79 Page 6 VLM 250 User Manual Contents Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 Table 34 Table 35 Table 36 Table 37 Table 38 Table 39 ASTECH 2009 Device models Darle li iaa 14 Device Models part2 iia arena 15 Assignment of the IF DIL Switch ooooonnococinoccconacanonncncnoncnononccnnnnanonnenonns 25 Assignment of the DIL switch ECC2 iii fetal dins 31 EED Signal Sib 33 Order codes for replacement WINdOWS oococconcccnoncccnoncnonnnnnononanonnnanonnaninnnos 34 Replacement cycle for lamina ln iia 35 PRC CUN
43. also be used to input command identical to serial interface 1 The echo is always on the interface 1 regardless of the input is serial interface 1 or 2 A simultaneous typing commands on both interfaces must be avoided The command input can switched off by the parameter T for S2Format This is absolutely necessary if a RS485 two wires connection is used otherwise the output strings would be interpreted as commands Syntax S2Format s T 10 13 s Zeichenkette 10 13 entsprechen CR LF LN If the S2 interface is switched to RS485 the command input must switched off by using the parameter T for S2Format otherwise the output strings would be interpreted as commands In the case of the S2 nterface command it must be observed that the baud rate is limited by the hardware depending on the interface used The baud rate of the serial interface 2 can be set as follows 2400 4800 9600 19200 38400 and 57600 The A parameter can be specified for the S2Interface command this activates the handshake lines only option IF1 with RS 232 ASTECH 2009 Page 56 VLM 250 User Manual Programming 9 7 Offline measurement 9 7 1 The OFFLine command In the OFF Line operating mode the measuring values as described before are not output to an interface but instead written into the internal memory The operating mode serves to create the velocity time processes and to accommodate very fast processes LN During the offline measuremen
44. amp is aligned and secured in an aluminum block The block is led through two set pins in the VLM 250 and held with a hexagon socket screw cylinder head M3 x 10 mm The electrical contact is made with cable connectors This allows fast and simple replacement 8 2 3 General hints The light source must be purchased either from your dealer or directly from the manufacturer The ordering designation can be found in the VLM 250 casing lid and on the packaging of the light source It is imperative that you observe the instructions for light source change Non installed light sources are very sensitive Please handle these with extreme care Do not touch the glass body of the new light source New light sources may only be stored in their original packaging Do not remove the light source from the packaging until just before you are about to install it If your fingers touch the bodies of the glass this can cause a drastic reduction in the life of the light source A Please ensure that no damage is caused to the structural components on the circuit board when the cover is open No dirt may contaminate into the device ASTECH 2009 Page 35 VLM 250 User Manual Maintenance Instructions for light source change 1 The device must be cleaned from outside before replacing the light source In case of extremely bad environment conditions the device should be removed from the plant prior to light source replacement in order to be
45. anically more stable than the OW series If the windows need to be cleaned often or if they wear quickly protective measures may be necessary e g PA2 free blowing unit or CBS cooling and protecting case with ACS air generation ASTECH 2009 Page 34 VLM 250 User Manual Maintenance 8 2 Lighting 8 2 1 Actual type with LED The VLM 250 is using a special LED with high light output But the brightness is reducing with the operating time The manufacturer gives an average reduction of 70 percent after 50 000 hours at 80 C chip temperature Thus an replacement of the LED every 20 000 operating hours is recommended T he LED chip is adjusted and fixed on an aluminum block The block is hold in the lighting unit of the VLM 250 through two pass pens and with a socket screw 3 mm The electrical contact is made with cable connectors This allows fast and simple replacement 8 2 2 Older type witch halogen lamp Older VLM 250 are equipped with a special 6 V halogen lamp whose service life is of course limited The lamp should therefore be replaced every 2000 operating hours Strong vibrations and improper handling may lead to premature lamp failure Switch on time per day Hours per year Replacement interval for lamp 8 hours single shift operation 2920 8 months 16 hours double shift operation 5840 4 months 24 hours three shift operation 8760 2 5 months Table 7 Replacement cycle for lamp The actual halogen l
46. ards of the IF2 series The output is updated at the next pulse edge either after reaching Average or after a trigger event refer to INCOutput command 9 4 1 The INCOn command This command switches the pulse output on or off When activating the pulse output the alarm output is automatically deactivated Syntax INCOn n n 0 off 1 on with IF2 series n 1 2 3 In devices with the IF2 or IF2F interface cards the n 2 parameter means that the additional two pulse outputs are switched on and the standard pulse output is switched off All 3 pulse outputs are switched on with n 3 A In order to minimise the load of micro processor unnecessary output channel should be switched off 9 4 2 The INCFactor command This command allows a scaling factor to be set 100 Hz are output with a factor of 1 if the velocity is 0 1 m s or the measuring rate 100 refer to INCValue and the Programming Examples in appendix Syntax INCFactor n n 0 000001 231 10 6 from Firmware 7 3 also neg The possible output frequency for the pulse output ranges from 0 4 Hz to 25 kHz If the value to be output is smaller than 0 4 Hz no pulses are issued In the case of devices with the optional IF2 series interface cards 3 parameters are possible Syntax IF2 INCFactor n1 n2 n3 n 0 000001 23 10 6 from V 7 3 also neg The n1 up to n3 parameters set the scaling factors for the three pulse outputs n2 and n3 are
47. as left the measuring window Syntax Chold n n 0 off 2 and 3 on Pulse output 3 second IF2 pulse output issues the currently measured velocity while the other two pulse outputs are freezeed It can thus be used for the connection of testing equipment The analog output and the serial interface are not affected by this Application example test lines with internal length measurement For Chold 4 the pulse outputs 1 default pulse output at AB and 2 first IF2 pulse output are freezeed on H level at IN1 in order to achieve a constant removal velocity after the measuring object has left the measuring window The trigger input IN2 see command Trigger control now the internal length measurement independent of the hold function is using input IN1 With control of the length measurement by using multiple photoelectric sensors linked to input IN2 e g light barriers Controller LBC2 the hold function for pulse outputs can only be realized witch Chold 4 and IN1 A simultaneous external directional control on IN1 and parameter 2 3 7 and 8 for Direction with Chold 4 is not appropriate Syntax Chold 4 n 0 off 4 on ASTECH 2009 Page 40 VLM 250 User Manual Programming 9 1 5 The Clock command Clock displays and sets the time for devices with a real time clock RTC Clock without parameter displays the time in the hh mm ss format The real time clock is optionally available Syntax Clock hh m
48. ation Application for individual parts measurement only With the Chold 1 or 3 command the control circuits can be blocked for the period in which no part is located in the measuring window trigger level inactive i e the values for exposure time and light source brightness valid at the end of a part are freezeed until the beginning of the next part If the individual parts have different colours or surface properties Chold should be deactivated Chold 3 can be used in connection with individual part measurements in order to freeze the pulse outputs 1 and 2 while the control circuits are freezeed This function is useful if the pulse outputs are used for the control of the removal velocity This ensures that the material is moved on at constant velocity even it is not located under the measuring device Syntax Chold n n 0 off 1 and 3 n Application example test lines and flying saws For Chold 2 or 3 the pulse outputs 1 standard pulse output at AB2 and output 2 first IF2 pulse output are freezed on an inactive trigger level In connection with flying saws with clamping saw control is connected to pulse outputs 1 or 2 this function can be used to prevent subsequent regulation when the clamping is active i e cutting length is determined This prevents technical control errors As already mentioned another application is the freeze of pulse outputs in order to get a constant removal velocity after the measuring object h
49. ation of the surge can lead to the protection switching transmitting and thus to the short term failure of the signal concerned ASTECH 2009 Page 20 VLM 250 User Manual Connection 6 3 AB3 connection card The terminal of the AB3 connection card contains the connections for the serial interface 1 programming interface the RxD TxD and GND the inputs INO IN1 and IN2 and the outputs OUTO to OUT3 The BR1 and BR2 terminals are only connected with each other and can be used as a bridge soc ZWAN E DU DKI ta See CON Laly POY SC m T D 6000 00000 SE Lal a 8 lt cObd 3044 E OO HI331509 s0 ES AL Zor Fig 7 AB3 connection card 6 3 1 Serial interface 1 A serial interface according to the RS 232 standard is used It serves to program the device and can also be used for data transfer The RxD TxD and GND connections are available device connection 1 Baud rate protocol type and parity are set via the S Interface command The VLM 250 is equipped with automatic baud rate identification which can be switched on via the SIInterface command The format is preset to 8 data bits and 1 stop bit Standard parameters are 9600 baud no parity and XON XOFF protocol The connection is made at the terminals identified by GND RxD and TxD The interface is opto isolated to all other connections ASTECH 2009 Page 21 VLM 250 Us
50. c double grid constant device with direction detection optional As 0 forward double grid constant see above 6 As 1 back double grid constant As 2 external to IN1 external doubled grid constant 8 As 3 external to IN1 external negated doubled grid constant Table 8 Direction settings For devices with FB1 filter board command JNFO shows no FB2 the maximum frequency of the filter board is issued when new values for VMAX and DIR are entered If the displayed frequency does not correspond to that printed on the FB1 board adjust VMAX until the two frequencies coincide ASTECH 2009 Page 41 VLM 250 User Manual Programming 9 1 8 The Error command This command indicates and then deletes the last error code refer to appendix Code E00 No ERROR indicates that there is no error In the event of fatal errors starting from E40 the device must be repaired Syntax Error 9 1 9 The Help command This command outputs a help text containing a list of all commands with short explanations The output can be interrupted with Escape ESC and continued by pressing any other key Syntax Help or 9 1 10 The Holdtime command This command sets the hold time which is to be bridged in the case of signal failures i e the last velocity value is output at the appropriate interfaces over this time If the signal fails for longer than Holdtime a zero or an error is output refer to Signalerror A signal f
51. cal transmission parameters Maximum cable length 15 m 30 m with special low capacity cable Maximum send level 15vV Minimum send level 5V Minimum receive level 3V Load resistance 3 to 7 kOhm Load capacity gt 2500 pF 10 9 2 RS 422 interface 1F1 422 1F2 422 The RS 422 interface serves to transmit data over great distances In the case of the VLM 250 the RS 422 interface is used to transmit measuring values In addition it can be useful to convert the programming interface RS 232 to RS 422 in order to bridge greater distances The interface allows full duplex operation i e a party can send and simultaneously receive data from another party A maximum of 10 RS 422 receivers may be connected with a transmitter The serial data are transmitted as voltage difference between the 2 wires of a cable RS 422 physical transmission parameters Maximum cable length 1200 m depending on cable type and transmission rate Maximum send level 5 V Minimum send level 2V Minimum receive level 200 mV Load resistance 1x 100 Ohm at the cable end receiver termination Encoder pulses can of course also be transmitted via an RS 422 interface as the standard determines only the levels impedance etc but not the type of data Thus the IF2 422 interface card provides 2 pulse output channels each with 2 phases according to the RS 422 standard ASTECH 2009 Page 77 VLM 250 User Manual Appendix 10 9 3 RS 485 interface IF1 ECC2
52. circuit diagram with analog output option ASTECH 2009 Page 29 VLM 250 User Manual Connection 6 8 IF PROFI and IF ETHER interface card The optional IF PROFI interface card allows for IF PROFI direct connection to Profibus DP The IF ETHER interface card provides 10 Mbit Ethernet communication with UDP IP and TCP IP protocol Please refer to the additional information included with the cards and provided on the Internet at www astech de Direction Output Trigger Output Profibus DP ID 0x2079 12M autodetect gt IN1 gt IN1 gt IN2 o gt IN2 o 18V TRIG TRIG GND 5V O Profibus A OV Profibus B o 5V O Profibus A o oV Profibus B Interfaceboard IF PROFI Fig 19 Principle IFPROFI circuit diagram ASTECH 2009 Page 30 VLM 250 User Manual Connection 6 9 ECC2 interface card The optional ECC2 interface card allows the connection of an external shaft encoder or a second VLM 250 velocity measuring device When the value falls below a selectable velocity or the measuring rate the pulse output is switched over to the shaft encoder or the second measuring device The two outputs COU1 and COU2 are electrically isolated by optical couplers They correspond in function and programming to the outputs OUT1 and OUT2 default setting for DIL switch output The criteria for switching over are programmable refer to ECC cont
53. command or at each burst Syntax OFF Output n n 0 1 2 9 7 5 The OF FRead command This command outputs the measured data to serial interface 1 after an offline measurement The reading format is fixed i e the time since the measurement start is output in ms and the value with maximum resolution The two figures are separated by a space character A new line CR LF is added behind the value If no measurement has yet been started a read attempt causes an error message refer to appendix Syntax OFF Read In the case of premature abort with ESC an error message is output refer to appendix ASTECH 2009 Page 57 VLM 250 User Manual Programming 9 7 6 The OFFTime command This command determines the time interval in ms in which the data is to be saved refer also to OFFOutput command During the velocity measurement all measuring data bursts captured within this time interval are compressed into an average and saved The time set by the Average command is not taken into consideration in offline mode Syntax OFFTime n n 2 65535 Unit ms 9 7 7 The OFF Value command This command determines whether velocity length number of objects or the measuring rate should be measured Syntax OFFValue c c V L N R 9 7 8 The POFF command Indicates all parameters for the offline measurement Syntax POFF 9 8 Read commands The read commands serve to asynchronously read out the measuring values They are
54. e Status signal and is programmable There are three inputs Standby mode Direction and Trigger input Additional serial interfaces an analog output various high resolution pulse outputs and a number of bus interlaces are available as options interface cards The system is located in an IP 65 casing It is powered with 230 V AC The device is also available for 24 V DC and 115 V AC power supply The VLM 250 is based on the well established VLM 200 model It combines the features of the VLM 250 with a number of additional advantages e Significantly improved signal processing capacity and optimised firmware allowing for measurements on virtually all surfaces from high gloss to matte black The system is automatically adapted to the surfaces Materials that were not suitable for measurement by optical systems can now be measured e Velocity measuring range easily adjustable by means of Vmax parameter e Improved reproducibility e Considerably increased reliability e g no circuit sockets various mechanical fuses e Update upgrade of the firmware via PC flash and bootloader e Light source monitoring error code and switch output OUTO e Temperature monitoring error code e Input for standby mode INO ASTECH 2009 Page 9 VLM 250 User Manual Operating Principle 2 Function 2 1 Physical principle The VLM 250 operates optically without contact and implements the principle of the spatial filter by means o
55. e in closed control loops The F series has been extended to include an averaging processor ASIC This calculates the weighted gliding average value according to the signal quality via the frequency of the single bursts A ring memory with 4 or 8 averaging cycles is used see figure 18 The temporal length of a cycle is represented in figure 18 as a section and corresponds to the averaging time The incoming individual values are asynchronously added the result is synchronously read out once per Average This allows an updating rate for the outputs 8 times higher than that of the VLM 250 standard The internal calculation of the length is not possible _ gemittelter Wert N A a va DS if Summe lesen S7 _ Do YF AN S2 und Nullsetzen L SF l gt Addierenc __ aktueller A Wert ES Ss ae Ai a E A EN Ea AK y Pa Schritt gt N A x MANS S4 1 x pro Average 5 Fig 29 Simplified operating principle of the averaging processor with 8 cycles The averaging time set by Average command is selected as high as the desired update time for the quickest output channel used Normal values for Average are 4 to 20 ms If only the pulse output or the analog output is switched on Average 2 ms is permissible If pulse output as well as analog output are switched on Average 5 ms must be selected If the serial output S1 or S2 is switched on Average should be set to gt 20 m
56. e value movement Use the Test command to check the sign character 9 2 4 The ANOutput command This command determines whether the output value is updated after the time interval set by the Average command ANOutput 0 refer to Average command or when a trigger event occurs ANOutput 1 refer to Trigger command Syntax ANOutput n n 0 1 9 2 5 The AN Value command This command determines whether velocity length number of objects or the measuring rate should be measured ASTECH 2009 Page 49 VLM 250 User Manual Programming Syntax ANValue c c V L N R If the option Analog Output for Exposure exists and ANValue R is set at the velocity of zero the value of the exposure time is output to the analog output This function can be used as an adjustment help in pipe and wire measurement applications The message for option Analog Output for Exposure is output via the S1 interface when the device is switched on 9 2 6 The PAN command Indicates all parameters of the analog output Syntax PAN 9 2 7 Example of analog output In the following diagram output 4 to 20 mA is represented in a velocity range of 3 up to 3 m s at different values for ANMIN and ANMAX The velocity is output to the analog output ANValue V ANMIN 3 ANMAX 3 ANMIN 2 ANMAX 2 ANMIN 0 ANMAX 2 Fig 28 Examples of analog output A Currents less than or greater than the range determined by the hardware
57. easurement A S 185 oe 170 Date 05 05 2007 of Speed and Length Seri 24 D Seres o Resp bod Weight 6 kg Angewandte Sensortechnik Sidi Scale 1 3 Fig 32 Installation drawing for various designs dimensions in mm ASTECH 2009 Page 79 VLM 250 User Manual Declaration of Conformity 11 Declaration of Conformity Manufacturer ASTECH Angewandte Sensortechnik GmbH Address 18057 Rostock Schonenfahrerstr 5 Germany Product name VLM 250 Description Optical measuring system for velocity and length Conformity with the following standards EN 50 081 2 interference transmission 30 230 MHz 30 dbu V m 230 1000 MHz 37 dbu V m EN 50 081 2 interference voltage 150 kHz 30 MHz EN 50 082 2 or IEC 1000 4 2 ESD 8 kV air discharge 4 kV contact discharge EN 50 082 2 or IEC 1000 4 3 EMC 27 1000 MHz EN 50 082 2 or IEC 1000 4 4 burst 2 kV EN 50 082 2 or IEC 1000 4 6 EMC 150 kHz 80 MHz Place Rostock Date December 2006 ASTECH Angewandte Sensortechnik GmbH AM Ab Ma Volker Ahrendt Managing Director ASTECH 2009 Page 80
58. ector 5 pin e g various inputs and outputs Female cable connector 4 pin B coding e g Profibus input Fig 31 Pin assignment of connectors for connections 1 2 4 and 5 ASTECH 2009 Page 75 VLM 250 User Manual Appendix 10 8 Order codes for interface cards Basic RS232 RS485 RS422 Analog output Analog output 25 kHz pulse 50 kHz pulse 500 kHz pulse 500 kHz pulse ECC2 shaft function output only output only 4 20 mA 0 20 mA 2 x 2 phases 2 x 2 phases 2 x 2 phases 2 x 2 phases encoder open collector status output balancing RS422 driver controller Option 24 V balancing 5V 15 30 V Without IF1 RS232 IF1 RS422 IF1 AL 4 20 mA IF1 AI 0 20 mA IF2 IF2 PP IF2F 5V IF2F 422 ECC2 RS232 IF1 RS232 IF1 RS232 ECC2 RS232 output only IF1 AL 4 20 mA IF1 AI 0 20 mA RS485 RS422 IF1 RS422 IF1 RS422 ECC2 RS422 output only IF1 AL 4 20 mA IF1 Al 0 20 mA Analog output IF1 RS232 IF1 RS422 IF2 IF2F 5V IF2F 422 4 20mA IF1 AI 4 20 mA IFI AI 4 20 mA IF2 AI 4 20 mA IF2 AI 4 20 mA IF2 AI 4 20 mA Analog output IF1 RS232 IF1 RS422 z 7 TF2 IF2F 5V IF2F 422 0 20mA IF1 AL 0 20 mA IF1 AI 0 20 mA IF2 AI 0 20 mA IF2 AI 0 20 mA IF2 AT 0 20 mA 25 kHz Pulse IF2 IF2 2 x 2 phases IF2 AI 4 20 mA IF2 AI 0 20 mA open collector 500 kHz pulse IF2F 5V IF2F 5V 2 x 2 pha
59. ed by the VLM 250 s electronic evaluation system It implements a short time frequency measurement via the evaluation of individual periods The velocity is calculated by multiplying the frequency with the device constant and the calibration factor The integration unit allows for the calculation of the object length based on the velocity not included in F and S series The integration unit can be controlled by an external signal trigger The device also calculates the measuring rate which can be used for the optimisation of the device installation and the monitoring of the measuring function 2 3 Interfaces The VLM 250 is equipped with various opto isolated interfaces of which some are optional The measured values can be output through the serial interfaces to a PC a control unit PLC or a printer Different pulse outputs are available for the connection of the counters The device also caters for optional analog output The standard version includes the following interfaces connection card AB3 e RS 232 serial interface S1 programming interface e High resolution pulse outputs with A B phase e Status signal output e Lamp OK output e Input for standby mode directional signal and trigger signal As an option the system can be equipped with the following interfaces interface cards e Second serial interface S2 on IF interface card RS 232 RS 422 RS 485 e IF analog output 4 to 20 mA other ranges optional e IF ser
60. ees 59 9 9 2 The Restart command yesica 59 9 9 3 The Restor command croi cash aaa anche a hae oa tae neato 59 9 9 4 The Simulation COMMA cuidar du cir denon 59 9 9 5 The Standby command 4 045650 a aia GAG Reade ise 60 9 9 6 The Store commands s jjdisssieantigedatsiadeian atados 60 9 9 7 The Update command 2d a 60 9 10 The VLM 250 F and S dencia 61 9 10 1 Operating principle of the F series oooooonocccnoocccnoncccnnnncnnonanonnnnnos 61 9 10 2 Operating principle of the S Series cooconnnococnnocccnonccnnnncconananinnnos 62 9 10 3 Commands of the F and S series with significant differences 63 A A E O 64 A 64 10 1 1 General commands incidental acciona 64 10 1 2 Analog output commandS sseeseesesessssesstssresressersresressereresreeseese 65 10 1 3 ECC control COmMand ss eiii anidan delas retos 66 10 1 4 Pulse output COmMANS ns itaiaRs 66 10 1 5 Commands for output via serial interface Sl oooonniconnnnccnnoncccnnns 66 10 1 6 Commands for output via serial interface S2 oo eee 67 10 1 7 Commands for offline measurement ooooonnccccnoncccnoncnonancninnncnnnnnos 67 10 1 8 gt Re d commands A E 67 10 1 9 A nsii n e 68 10 2 Programming example 69 10 3 Error MESS ages asi a n aa ii 70 104 EED SINAIS dois arras 72 10 Output value US curia ais 72 10 6 PASTOS A A A eae 73 10 6 1 Device connection 1 RS 232 ooccccnnnnninccccnnononnnnnnnncccnccnononaninisos 73 10 6 2 Device connection 2 signal
61. electrically isolated by optical couplers The outputs are designed as balanced driver stages HP3120A driver The maximum output current is 100 mA per channel The maximum cable length is 200 m The necessary external voltage equals 15 to 30 V OUT4 is the pulse output A2 OUT4 is A2 OUT5 is B2 OUTS is B2 OUT6 is A3 and OUT7 is B3 The OUT3 status output is available too see chapter Outputs and Programming of the pulse output The card needs an external supply voltage of 15 to max 30 V A The outputs of the IF2F PP interface card are only short circuit protected against GND Connection to the operating voltage can lead to destruction of the relevant channel O 15 30V K Optoisol Highres two Channel Pulse Outputs with Push Pull Driver Protection Circuit Interface Board IF2 PP Fig 16 Principle IF2 PP circuit diagram ASTECH 2009 Page 27 VLM 250 User Manual Connection 6 7 IF2F 5V interface card The optional IF2F 5V interface card provides two high resolution pulse outputs each with 2 phases and a frequency range of 0 4 to 500 kHz Resolution and error equal 20 ns Additionally an opto isolated analog output 16 bit resolution 4 to 20 mA or O to 20 mA can be mounted The four eight OUT4 to OUT7 are electrically isolated by optical couplers but have the same reference potential The OUT4 5 and OUT6 7 outputs can be scaled independently A clock o
62. er Manual Connection 6 3 2 OUT outputs The three outputs OUTO OUT1 and OUT2 AB3 connection card are also electrically isolated by optical couplers They are transistor outputs sharing a collector connection TE ES Optoisol TxD sie RS232 O Serial interface S1 S1 ___ A RS232 Interface OUTO EA OUT oF o Lamp gt K OUTO E o athe ES ___ OEA Outputs with shared positive reference potential PNP output OUTI y Pulses1A ___ OUT 5 ouT2 gt _ er Pulses1B _ a INO y A 1k INO Standby S vo O IN1 Ni RIO 3 separate inputs irecti IN1 p Pp Direction IIS IN2 mH pN2 gt Trigger y 1k IN2 t sas o Digital IN OUT Protection Circuit Connection Board AB3 Fig 8 General design of AB3 connection board The shared OUT connection is normally powered from an external source with 10 to 30 V e g 24 V The load at the outputs OUTO to OUT3 is connected to 0 V The output transistors can drive a maximum current of 40 mA each If an external voltage of 24 V is to be used load resistors of 1200 Ohm each should be used to reach 20 mA The load might consists of an optical coupler see Fig 9 Wiring example for the outputs of the AB3 The outputs OUTO to OUT3 are short circuit proof and surge proof For high ohmic inputs an additional load resistor e g 1 2 kOhm must be connected in parallel to the i
63. es automatically after 60 seconds The automatic abort can be stopped by specifying the C parameters gt TEST Vi m s L m RATE INI N2 EXPOSURE 99 999 99999 999 99 1 0 3 gt Fig 25 Screen text of Test command Syntax Test C Parameter C suppresses the automatic abort The test command can possibly delay the output to other channels Therefore it should only be called when necessary F With devices of the F and S series the value for length is omitted as these devices are Ss not equipped with an integrated length measuring system 9 1 23 The TestAn command This command displays a number of values which provide information about the analogue output The following values are displayed continually velocity measuring rate output current in percent und load With no load is connected max 500 ohms or no analogue interface card is installed the value for load is zero The display is updated every 333 ms During the test procedure the S1 output is blocked The procedure can be aborted with ESC gt TESTAN ANON 1 ANMIN 0 000 ANMAX 10 000 V m s Rate IOUT LOAD 3 623 98 36 2 1 gt Fig 26 Screen text of TestAn command Syntax TestAn The test command can possibly delay the output to other channels Therefore it should only be called when necessary ASTECH 2009 Page 45 VLM 250 User Manual Programming 9 1 24 The Tracking command The Tracking command dete
64. f a CCD sensor Spatial filter is the generic term used to describe a measuring principle for the non contact determination of the velocity and length of moving materials The spatial filter is based on the filtering effect of grid like structures grid modulation The function of the VLM 250 can be described as follows The lens is oriented towards the moving measuring object the object producing an image on the CCD line The CCD line is operated as an optical grid no image pickup To illuminate the measuring object a white light source is used External light is effectively suppressed with this method Due to the grid modulation the movement of the object generates a frequency which is proportional to its velocity 1 e the structure of the measuring object brightness contrast generates a signal This signal is hereinafter known as a burst These bursts are evaluated by the system i e the signal frequency is measured and the velocity calculated thereof There are several control circuits that enable automatic adjustment to the most varied of materials material surface structure and brightness RS232 Pulse Status il T RS485 422 4 20 m Pulse Mid Profibus Ethernet AO v f k v Velocity f Signal frequency k Device constant Fig 1 Design of the VLM 250 ASTECH 2009 Page 10 VLM 250 User Manual Operating Principle 2 2 Evaluation The signal frequency burst frequency is determin
65. h ESC 9 9 6 The Store command The command saves the current settings These settings remain stored when the device is switched off After switching on the device or executing the Restore command the last settings saved by Store are loaded The command is protected by a password When entering the password no distinction is made between upper and lower case letters The factory set password is WEGA Syntax Store 9 9 7 The Update command The command changes into the boot loader The boot loader can update the firmware of the device The boot loader shows the necessary steps There is a special device file required Update file hex only the manufacturer of the equipment can be generated on hand serial number Syntax Update We recommend the use of the program VLMTERM to perform a new firmware A About the command File Update Firmware update can quickly and safely executed It is only necessary the selection of update file ASTECH 2009 Page 60 VLM 250 User Manual Programming 9 10 The VLM 250 F and S device series F Compared with the description of the previous chapters the meaning of some ts commands in the F or S device series are different Important modifications are marked with in the following section 9 10 1 Operating principle of the F series The F series was developed for highly dynamic velocity measurements in the production process and is especially suitable for us
66. ies interface card with two high resolution pulse outputs and analog output optional e ECC2 shaft encoder coupling with optional serial interface S2 RS485 e Ports for network connection via IFPROFI Profibus DP or IFETHER UDP IP TCP IP All interfaces are distinguished by high flexibility programmable scaling and output time and can be easily configured 2 4 Configuration All settings can be made through the serial interface S1 RS 232 using a PC and a terminal program The user friendly VLMTERM terminal program is provided free of charge The individual commands of the VLM 50 are described in chapter Programming The set parameters can be protected with a password Any changes made are lost after switching off the device unless they were saved with the password protected Store command ASTECH 2009 Page 11 VLM 250 User Manual Device Models 3 Device models The device is available in various designs series which are compatible with each other both electrically and as regards their connections Most of the optional equipment interface cards mounting accessories etc can be used with all designs Differences in the available measuring range the working distance and the distance variance result from the different optical equipment of the A L and D series Fy The devices of the F and S series feature fast signal evaluation The resulting differences as regards programming are explained in a separate chap
67. ject see drawing in the appendix special designs possible The standard direction of movement forwards is determined from the bottom of the casing to the casing cover special designs possible The direction of movement plus means forwards is identified by an arrow on the device Installation can take place either in positive or negative direction Only the Direction parameter must be set accordingly see chapter Programming The device does not need to be opened for installation It is secured with four M6 hexagon socket screws It is necessary to maintain the correct working distance distance between lens window and material surface and the range variation specified by the manufacturer see rating plate of VLM 250 o ASTECH e mye ane i I l 1 1 Working i i Distance Movement Direction of the Object 1 I y i I go Working Distance Tolerance i gt Y Moving Object Moving Object Fig 2 Working distance see rating plate and alignment relative to surface Movement Axis Moving Object Moving Direction of the Object Angle with max tolerance of 1 1 1 l l i l l d I l l I 1 1 1 1 1 P i I Fig 3 Alignment to vector of velocity ASTECH 2009 Page 17 VLM 250 User Manual Installation The installation is carried out at right angles to the direction of movement of the material with a maximum tolerance of 1
68. m ss 9 1 6 The Date command Date displays and sets the date for devices with a real time clock RTC Date without parameter displays the date in the dd mm yy format The real time clock is optionally available Syntax Date dd mm yy 9 1 7 The Direction command This command determines the source of the directional switch over If the direction of movement of the measuring object and the direction specified by an arrow on the device coincide the movement is defined as forwards For units without the optional direction detection Direction 4 is not permissible A If a direction is incorrectly set this causes corrupt messages The error can increase with greater speed The codes 5 6 7 and 8 have the same function as the codes 0 1 2 and 3 see table 7 Please note that in the case of Direction 4 to 8 the velocity range and technical data change see chapter Device models The use of the codes 5 6 7 and 8 can be useful to adjust the optical resolution of the device to the surface of the measured object Thus a higher signal rate can be achieved in the case of rough structures e g rough steel wood paper with back light illumination At higher velocities they might even be mandatory see chapter Device models Syntax Direction n n 0 8 0 Forward S O 2 External to IN1 40 to 0 3 mA forward 5 to 40 mA back 3 External to IN1 40 to 0 3 mA back 5 to 40 mA forward Automati
69. mation applications Typical uses include the length measurement of materials that come in lengths and the cutting control or subsequent checking of sheet metal profiles and tubes The VLM 250 is used together with rewinders calanders and extruders as well as with rolling and temper mills The VLM 250 operates optically without contact and implements the physical principle of the spatial filter via the use of a CCD sensor An image of the optically resolvable material surface structures is produced on the CCD sensor The sensor converts the movement into a frequency from which the velocity of the movement can be calculated An external or internal integrated unit calculates the length The integration unit can be controlled by an external signal start stop signal through trigger input The velocity is calculated and the length is integrated based on the positive or negative sign The direction can be controlled by an external signal An automatic direction detection device 1s available as an option The output signals are generated by a processor The VLM 250 can be connected to an existing control and process data capturing system All inputs and outputs are opto isolated A RS 232 serial interface serial interface 1 is provided as a programming interface The VLM 250 basic model is equipped with an AB3 connection card featuring four outputs one Lamp OK output and two programmable Pulse outputs phases A and B The fourth output is used for th
70. nnections 2 4 and 5 signals IN OUT Type series Order number Female cable connector shielded Esto B rsig Series 713 99 1436 814 05 Female angled 90 connector shielded Esto B rsig Series 713 99 1436 824 05 Female cable connector metal not Binder Esto Borsig Series 713 99 0436 55 05 shielded Female dual connector not shielded Binder Binder Esto B rsig Series 713 99 0436 142 05 10 7 3 Cable connector for connection 3 115V AC 230V AC Type series Order number Female cable connector FEC Farnel 99 4222 00 04 Female angled 90 connector Esto B rsig Series 693 99 4222 70 04 10 7 4 Cable connector for connection 3 24V DC Type series Order number Female cable connector Esto B rsig Series 693 99 4218 00 07 Female angled 90 connector Esto B rsig Series 693 99 4218 70 07 Blue standard equipment Subject to changes 10 7 5 Assembly instructions for shielded connector Fig 30 Assembly instructions for shielded connector 10 These instructions apply to connections 1 2 4 and 5 ASTECH 2009 Page 74 VLM 250 User Manual Appendix 10 7 6 Pin assignment of male and female cable connectors A All drawings show the screw side of the connectors Male cable connector 5 pin e g RS 232 Male cable connector 8 pin e g 5 V pulse output Male cable connector 4 pin B coding e g Ethernet and Profibus output Female cable conn
71. nput The OUTO output Lamp OK indicates that there is a current to the lamp or LED A clock out of phase by 90 is made available at the pulse outputs OUT1 phase A and OUT2 phase B see pulse generation pulse output 1 By default output OUT3 status indicates that measuring values are available the function of the output corresponds to that of the SIGNAL LED on the front panel of the device If the LED is green OUT3 is switched through The output can be programmed with either the Minrate command or the ECC control ASTECH 2009 Page 22 VLM 250 User Manual Connection OUTO 24V Lamp Lamp OK OUT3 Status Status OUT1 PulsestA OV GND cule Pulses 1 Pulses1B 1k i Y gt K TESA 9 Pulses 1 ik E Phase B OV GND Fig 9 Wiring example for the outputs of the AB32 A AB 4 PP connection board with push pull outputs The AB 4 PP card can be installed instead of the AB1 in the VLM 250 The push pull outputs OUTO OUT1 OUT2 and OUT3 provide 20 mA per output at a 24 V level 6 3 3 Inputs INO IN1 and IN2 The inputs INO standby IN1 external directional input and IN2 trigger on the AB3 connection card are electrically isolated by optical couplers An input current of 40 to 0 3 mA or an input voltage of lt 2 V corresponds to the L level an input current of 5 to 40 mA or a voltage of gt 10 V corresponds to the
72. ns 52 9 4 2 The NCFactor command c cccccccccesessessecececccseeesessaeceseceens 52 9 4 3 The NCOutput command A a na 53 9 4 4 The NCValue command c ccccccceceseesenseceeececsesesessnseceeeceens 53 9 4 5 The PING command ineeie a 53 9 5 Output via serial interface Dunst ios 54 9 5 1 The S On command sra nian a RN a S a 54 9 5 2 The S Format command heessa a I 54 9 5 3 The SlInterface command AAA Be nls 55 9 5 4 The S Oniput command t 55 9 5 5 The S Time command c ooccccncnnnnnnoonnnnnonocnononnnnnnnnnnnonononnanononononccnons 56 9 5 6 The PSL cOMMad dui aia dani adv 56 OG Omputbyvia senal Mer ace Za 56 97 Offline MeEasureMe nls inh een Pood sedesesshes Senne deecess dbo onab see cued spa veoneddarsecs bbees 57 9 7 1 The OF FLine command cccccccccecesesssnsececececseeesensaeeeseceens 57 9 7 2 The OF Factor commandar a nna Ea 57 9 7 3 The OFFMeasure command ccccccccceesessececececeeessessneceseceens 57 9 7 4 The OFFOutput OM tase iensslacuttenas 57 9 7 5 The OFFRead command cococccnnnnnoouoonnnnonnononnonononononnononnananonononccn n 57 ASTECH 2009 VLM 250 User Manual Contents 9 7 6 The OFF Fine command 3 ej stsasieasaadiacdeieadun vealed acesaandseesedesantonaads 58 9 7 7 The OFFValue command a 58 9 7 8 The POFF command asian dai iieii 58 O eamenee 58 99 System COMO ias ios 59 9 9 1 The Password command 255 50 sacsis aap cesta aads aeesetatoceseae
73. ntial velocity measurements The following conditions must be observed e The parameterisation of the devices is the same The devices should be mounted in the same direction of movement and are equipped with a high resolution pulse output IF2 or IF2F interface card or a fast serial output e Serial communication requires external synchronisation e A necessary directional switch over is carried out via an external signal command Direction lt 3 Programming examples of the S series with pulse output IF2F Average 0 external synchronisation Window 8 8 windows Trigger 0 H active Direction 1 devices mounted in the opposite direction to that of movement Minrate 10 programming of the monitoring output INCOn 2 high resolution pulse outputs switched on INCFactor 1 10 10 factor 10 pulses mm for high resolution outputs INCOutput 1 updating of the pulse output trigger synchronous The 24 V cycle at the IN2 input allows a maximum synchronisation frequency of 500 Hz 2 ms A frequency of 100 up to 300 Hz is recommended The OUT 3 output is used as a monitoring output and is controlled by the Minrate parameter All other outputs are switched off ASTECH 2009 Page 62 VLM 250 User Manual Programming 9 10 3 Commands of the F and S series with significant differences Average Window Calibrate Table 16 Cycle time for averaging processor Number of windows of the averaging processor Calibration
74. nual Maintenance S Maintenance 8 1 Windows The VLM 250 is an optical device This means that the object to be measured must be seen by the device Therefore it is necessary to check the windows at regular intervals and if necessary to clean them The windows should be cleaned with a soft lint free cloth and a normal detergent for windows O Al Window for lens Window for optional Laser receiver Window for lighting Fig 22 VLM 250 windows Replace damaged windows without delay To do this the device has to be dismantled from the plant and cleaned The window may only be replaced in a clean environment The 4 hexagon socket screws key width 2 0 must be loosened The window can be lifted off the seal with a flat screwdriver Neither the inside of the window nor the lenses may be touched The new window should be secured with 4 screws The screws should be cleaned first moistened with very little screw lubricant and screwed in Device Replacement window lens Replacement window lighting VLM 250 h measuring device OW 4 OW 3 Option stainless steel window OWRM OWRM All other VLM 250 models OW 2 OW 2 Table 6 Order codes for replacement windows The windows OW 2 and OW 3 consist of special glass with high transmission The OW 4 window reflects infrared rays The windows OW 3 and OW 4 have an increased temperature resistance The optional window OWRM is resistant to oil gasoline and kerosene and is mech
75. ommanderen aiae S aah EEEn 44 9 1 21 The Temperature command coooocccnnococcnonononnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnos 44 91 22 The Testcommand daanan ena aaa an sisi 45 9 1 23 The TestAn command cccccccccccsessssccececececeesssseceeeeeesesensnsaaeees 45 9 1 24 The Tracking Command 2515s sits Pacesdeegicsbesteesd wighelaaretncaiveaiasnieds 46 9 1 25 The Trigger command rr lid 47 9 1 26 The VMaxcommand eian A e A 48 927 ADIOS O PUC nti ea ec a a a a ne cane s 49 9 2 1 The ANON commander a tai 49 9 2 2 The ANMin command ccccsesscccececeeeessnsececececseeessnsaeeeseceens 49 9 2 3 The ANMax command ueraia a E ERENS 49 9 2 4 The ANOutput command ce Aitiendssncetooiatgie diene 49 9 2 5 The ANValue COMIDA ooocccnnnnooonoonnononnononnnnononononcononnnnonononcnconon 49 9 2 6 The PAN command namina a uaa a 50 9 2 7 Example of analog OUtpUt ooooocnnncocnnocccoonccnnoncnononanononanonnncnnnnncnnnns 50 93 ECC Controla sesaat E EE E E AA E bes ae Ss 51 9 3 1 The ECCOn command conccccncnnnnnunonanononnnnononnonononnnonnononnanononononncnon 51 9 3 2 The ECCRI COMMANA a a R I aS 51 9 3 3 The ECCRZ commandi sranna en n Ra E nS 51 9 3 4 The ECCVI commanda a tek a E EAR 51 9 3 5 The ECCV2 Command ai Ren aiii e a ei sa 51 9 3 6 The PECC command cooocnccncnnnnnnnanonanonononnononnnnonononconononnnnononononcnnono 51 QA Pulse dut a ao 52 9 4 1 The INCOn command cococcncncnnnonononanononocnononnnnonononcnnononnnnonononcnnono
76. on 9600 N X interface Time or trigger controlled 0 Time output 1 Trigger Output time ms 3 65535 Indicates the S2 parameters fs Table 22 Commands for serial interface S2 10 1 7 Commands for offline measurement i i Possible values Default value OFF Value V Velocity V L Length N Object counter R Measuring rate Scaling factor 0 000001 231 10 6 1 000000 OFFLine Starts the offline T awaiting trigger PA measurement 1 65535 OFFMeasure Measuring time 0 Time OFFOutput Time of output to memory 1 Trigger 2 Synchronous to burst OFFRead Reading of the offline data OFFTime Averaging and storing time POFF Indicates the parameters for offline operation Table 23 Commands for serial offline measurement 2 65535 1 10s 10 1 8 Read commands and V_ Velocity 1 23456 L 4 Length m 1234 5678 R__ Measuring rate E es ee __ N__ Object counter E ES AA F __ Signal frequency 1234 45 Table 24 Read commands 8 not with VLM 250 F and S series ASTECH 2009 Page 67 VLM 250 User Manual Appendix 10 1 9 System commands Meaning Sets password Cold start new initialisation Warm start reset of parameters only Simulation Simulation n1 n2 nl velocity in m s n2 measuring rate Standby Standby mode Save parameters Update Firmware Table 25 System commands ASTECH 2009
77. on of the VLM 250 save values with Store Syntax Readpara 9 1 16 The REM command All following characters are ignored REM is used to insert comment lines into parameter files which can be sent via the programming interface to the measuring device to program the VLM 250 The characters semicolon S N and gt have the same function as REM It is thus possible to send parameter settings read by means of the Readpara command back to the device Syntax REM s 9 1 17 The Serialnumber command This command displays the serial number of the unit Syntax Serialnumber ASTECH 2009 Page 43 VLM 250 User Manual Programming 9 1 18 The Signalerror command This command influences the error handling in the case of signal failures the parameter 1 causing the output of an error after a signal failure and the exceeding of Holdtime i e the velocity and length values are marked as incorrect and E EEE is output for example The same effect is achieved with switched on measuring rate monitoring refer to Minrate command if the value falls below the selected measuring rate In the case of parameter 0 no error is recognised but instead the velocity is output as zero and length integration is stopped This also allows a standstill of the measuring object The Signal LED and the status output OUT3 are not influenced by the Signalerror command Syntax Signalerror n n 0 1 Value O Signal failures permitted E
78. ontinuous measurement for unstructured 8 with additional search non metallic surfaces with high acceleration function for poor signals from zero e g conveyor plants for plastics or coated materials reeling machines for papers 4 In line with velocity from zero Continuous processes for non structured with additional search function non metallic surfaces for poor signals extruders paper machines Table 10 Parameters for Tracking ASTECH 2009 Page 46 VLM 250 User Manual Programming 9 1 25 The Trigger command The Trigger command serves to determine the type of trigger signal Each trigger event increases the object counter by 1 refer to Number command Syntax Trigger n n 0 1 2 3 Code Command CHOLD Command CHOLD 2 UH edge Low high edge 3 H L edge High low edge Table 11 Trigger type Individual part If the signal goes to the active level the length measurement is started and stopped at the next level change Continuous measurement Measurements are made continuously A trigger edge stops the measurement and simultaneously triggers the next measurement Trigger 0 I A i i Trigger 1 i i i Trigger 2 i i i p pg Trigger 3 a Yo ot AAAAAAAA lt lt lt k KK Fig 27 Active length measurement respectively active trigger signal based on command Trigger and IN2 level Together with a stop of the length measurement the relevant
79. process dynamics a scan frequency of 50 ms is set The VLM 250 shaft encoder output is connected to the existing process control unit Calculation Output frequency in kHz factor 1 mm velocity in m s equivalent to Pulse number 1000 factor 1 mm length m Factor pulse number 1000 length m 2 1000 0 001 Factor 2 i e direct input of pulse per mm is possible Average 50 Average time 50 ms INCValue V INCOutput 0 INCOn 1 Table 27 Programming example for pulse output ASTECH 2009 Page 69 VLM 250 User Manual Appendix 10 3 Error messages All error messages begin with the letter E and a two digit error number Starting from error code E10 the last error occurring during operation is intermediately saved and can be displayed via the Error command or deleted Enter parameter X in the format instructions S Format and S2Format to set the system to continuous error output from E10 EO0NoERROR Noerroroccurred ______________ E01 Missing parameter No or insufficient Incorrect command input parameters specified E02 Value out of range Figure too small or too Incorrect command input big E03 Invalid command E04 Invalid parameter Parameter not allowed E05 No data E06 Memory full Memory full Too many measuring values during offline measurement E07 ESC abort Abort with ESC Offline measurement and calibration E08 Signalerror Signal failure Signal failure during calib
80. ration E09 Illegal Use Incorrect password entered 3 times VMAX and DIR exceeded to data sheet power supply by power supply AVERAGE AVERAGE adjusted Table 28 Errors during command input and processing Output too fast E15 S2 buffer overflow S2 buffer overflow Transfer error see S2 nterface error output error error measurement Table 29 Errors caused by non correct parameters ASTECH 2009 Page 70 VLM 250 User Manual Appendix range processing detected greater than 75 C 1t to cool down detected reset overload Watchdog timer reset Table 30 Critical errors The elimination of critical errors requires changes to the program or the operating conditions E40 Parameter lost Data in EEPROM Fatal error check all parameters service necessary corrupt E41 Loading ASIC 1 ASIC 1 failed Fatal error device must be repaired failed service necessary E42 Loading ASIC2 ASIC 2 failed Fatal error device must be repaired failed service necessary E99 Unknown error Table 31 Fatal errors requiring a check of the device E80 Non valid hexfile Non valid hexfile Non valid file E81 Ilegal address Illegal address range Non valid file range E82 User terminated User terminated the file transfer E84 Verification error Verification error after Do NOT turn the device off or exit boot no valid program in programming loader Try again the command Update flash memory jumper and try again
81. re converted into positive values During calibration the measurement progress is indicated in percent and the BUSY LED is yellow Press the ESC key to abort the process After the measurement has been completed the new calibration factor is indicated The value is saved by Store as are all other parameter modifications The calibration factor is calculated according to the following formula Kalibrierfaktor BOWES Istwert Syntax Calibrate c n1 n2 c V L nl 1 65535 n2 0 0001 10000 Units nl s seconds for velocity calibration n quantity for length calibration n2 m s for velocity calibration m for length calibration In order to improve the accuracy of the calibration set Signalerror to 1 this ensures that the velocity cannot be 0 Use Minrate to define the minimum measuring rate If the value falls below this an error message occurs refer to appendix F n Devices of the F and S series do not feature parameter c In these devices a velocity S calibration is completed by default ASTECH 2009 Page 39 VLM 250 User Manual Programming 9 1 4 The Chold command This command is used to freeze the control circuits for adjustment to the brightness of the material surface and or the pulse outputs 1 and 2 depending on the level at the IN2 trigger input Chold 2 or 3 level see command Trigger or only the pulse outputs on H level at IN1 Chold 4 There are different kinds of applic
82. red signal LED can be caused by various things No measuring object exists measuring object outside the VLM 250 operating range Measuring object is at a standstill or is out of velocity range Measuring object has insufficient structure Measuring object too bright or too dark Dirty window refer to chapter Maintenance Measuring rate is too low only if measuring rate monitoring is switched on see Minrate command 7 Velocity or measuring rate outside the permissible range only if ECC function is switched on see ECCOn command OUT3 status output is switched together with the signal LED If the LED is green OUT3 is switched through During initialisation after switching on the device or after the Restart command the signal LED is yellow Busy LED This LED is yellow while processing commands see chapter Programming during calibration refer to Calibrate command or during offline measurement see chapter Offline While the busy LED is yellow the output channels are not addressed or addressed with a delay Error LED If the red error LED constantly flashes there is a technical defect If it flashes at short intervals or constantly during operation certain parameters are incorrectly set or there were transmission errors In all cases the cause should be determined using a PC and the Error command and then eliminated as otherwise errors in the measuring results are possible NAS ASTECH 2009 Page 33 VLM 250 User Ma
83. rmines the type of adjustment of the signal processing to the current speed It is only effective in devices equipped with a FB2 filter board or higher an installed FB2 filter board is listed in the initial screen text after switching on the device alternatively use the Info command to view a list of mounted components Syntax Tracking n n 0 1 2 3 4 A For proper measuring ensure that the settings for direction made with the Direction command and the maximum plant velocity configured with the VMax command are correct Default settings Tracking 1 Tracking 1 is suitable for most measuring tasks Other tracking values should be chosen only for special applications For details refer to the value table for Tracking Code Meaning Typical application 0 Broadband signal processing Special applications e g individual part corresponds to previous model measuring with long hold time and high FB1 acceleration Holdtime is greater than the distance between two parts 1 In line with velocity from VMax Continuous measurement with high 8 up to this point broadband acceleration from zero e g conveyor units for metals suitable for most measuring tasks 2 In line with velocity from zero Individual part measuring or continuous measurement with low acceleration from zero measuring object enters unit at a velocity greater than zero or is slowly accelerated from zero 3 In line with velocity from VMax C
84. rol The switch over is implemented by the status signal which can be picked up parallel to OUT3 and then indicates which measuring device is active A direction signal is generated from the phase direction of the INC inputs This can be picked up via the lateral terminal and be connected with the IN1 input of the AB3 interface card The DIL switch controls the COU2 output It is possible to switch between phase B or direction output Additionally the second serial interface S2 as RS232 or RS485 can be mounted O GI9Y_BZ9U QS mB DW D m NO cn z NO gt LNdlno noo g u Y10 Y mg na Zens TO gt U IAVYGANY AIDA Fig 20 ECC2 interface card Position of DIL switch termination for RS 485 option SW601 1 RS 485 with 120 Ohm terminating resistor ON RS 485 without termination OFF Position of DIL switch output SW602 1 SW602 2 Phase A and phase B ON OFF Phase A and direction OFF ON default settings Table 4 Assignment of the DIL switch ECC2 ASTECH 2009 Page 31 VLM 250 User Manual Connection Optoisol Inputs Optoisol Pulses Outputs DC DC 18V 80mA RS485 S2 Protection Circuit Nc o YR O INC2 AO YA 220 INC1 INC2 _ COU1 cou1 O _ COU2 a Protection Circuit PO _ cou2 0 Encoder Board ECC2 POWER Za Fig
85. rror if no signal Table 9 Signal error 9 1 19 The Start command The effect of the Start command depends on the Trigger command which determines whether an individual part measurement or a continuous measurement occur For the measuring of individual parts the length integration is started from length value zero With continuous measurement the length integration is stopped and restarted Syntax Start 9 1 20 The Stop command The effect depends on the Trigger command Only in the case of an individual part measurement is the integration of the length stopped Syntax Stop F The commands Start and Stop are not available with devices of the F and S series as Ss they do not include an integrated length measuring system 9 1 21 The Temperature command The temperature inside the device is indicated in C If the temperature exceeds 75 C error E31 Over temperature detected is triggered see Error command Syntax Temperature ASTECH 2009 Page 44 VLM 250 User Manual Programming 9 1 22 The Test command This command displays a number of values which provide information about the system functionality The following values are displayed velocity length measuring rate IN1 IN2 inputs and lighting incl Over for overdrive of the sensor The display is updated every 333 ms During the test procedure the S1 output is blocked The procedure can be aborted with ESC otherwise the command terminat
86. s depending on the string length When using the EEC control Average should be set to 5 ms 6 Windows 8 i e 8 floating windows totals S1 to S8 ASTECH 2009 Page 61 VLM 250 User Manual Programming LN In order to minimise the load of micro processor unnecessary output channels should be switched off The gliding average can be switched off with the WINDOW 1 command WINDOW 4 reduces the number of averaging windows to 4 WINDOW 8 is the standard setting from software V 6 5 Note that all internal processes and outputs are synchronised to Average Outputs which are not released at the Average moment e g output time differs by a multiple from Average or trigger controlled outputs are only carried out after achieving the next cycle specified by Average 9 10 2 Operating principle of the S series Additionally devices of the S series allow the synchronisation of the averaging processor and thus of the complete system via an external signal In order to reach this a clock frequency of 30 to 500 Hz must be connected to the trigger input IN2 The Average and Trigger parameters must be set to 0 The commands INCOutput 1 SlOutput 1 etc allow the configuration of the externally synchronised output of the velocity value If for example two or more measuring devices of the types VLM 250 S or VLM 250 SD are controlled by the same clock frequency it is possible to carry out highly precise and dynamic differe
87. serial interface 1 is stopped This status is indicated by the yellow BUSY LED The modified parameters are lost 1f they were not stored by Store prior to switching off the measuring device F PE s Please note that some parameters have a different meaning in connection with devices of the F and S series 9 1 General commands 9 1 1 The Average command This command serves to set the averaging time for velocity and measuring rate calculation The internal length calculation is independent of the set averaging time In devices with integrated FB2 and Tracking lt gt 0 the signal processing upon acceleration is adjusted in the Average time base Within the time determined by Average all signals bursts occurring are compressed into an average value The average value can then be output to the respective interfaces The command without parameter indicates the averaging time The value selected should be as large as the process dynamic allows Common values are 10 to 50 ms 100 to 250 ms for VLM 250 of the L series A too long Average causes a delayed reaction to speed changes At very high speed changes it can in rare cases lead to signal failures Is Average too short the measured value fluctuates more however you can find vibration of the object or measuring device in the measured signal Syntax Average n n 5 65535 Unit ms Fr Devices of the F and series are not equipped for internal length measurement
88. ses IF2 AI 4 20 mA IF2 AI 0 20 mA 5V 500 kHz pulse 7 7 IF2F 422 IF2F 422 2 x 2 phases IF2 AI 4 20 mA IF2 AI 0 20 mA RS422 BOC encoir ECC2 RS232 ECC2 RS422 controller Table 39 Order codes for interface cards Function of the standard AB3 connection board RS232 interface PNP Lamp OK output 2 phases 25 kHz pulse output Status output Standby Trigger and Directional input Additional interface cards IF PROFI for Profibus DP and IF ETHER for 10 MBit Ethernet ASTECH 2009 Page 76 VLM 250 User Manual Appendix 10 9 Description of the serial interfaces 10 9 1 RS 232 interface AB3 IF1 ECC2 The RS 232 interface serves to transmit serial data between two devices As almost all computers are equipped with an RS 232 interface COM1 COM2 the VLM 250 has an RS 232 interface electrically isolated for configuration Due to an electrical isolation the RS 232 is also suitable for an industrial environment The interface allows full duplex operation i e a party can simultaneously send and receive data from another party The TxD RxD and GND signals are used Data transmission is controlled via the XON XOFF protocol software handshake i e if the receiver is not ready to receive he sends the XOFF signal to the transmitter which then interrupts the transmission If the receiver is ready to receive again he sends the XON signal The transmitter then continues the transmission RS 232 physi
89. switches in the RS232 component variant A It should be observed that the RS485 interface must be terminated at both cable ends with 120 Ohm and the RS 422 interface with 100 Ohm at the last receiver Positions of 4 fold DIL switch RS485 422 SW500 1 SW500 2 RS 485 default settings ON ON RS422 with receiver open circuit fail save OFF OFF RS422 without receiver open circuit fail save OFF OFF Positions of 3 fold DIL switch termination SW501 1 RS 485 with 120 Ohm terminating resistor ON RS 485 without termination default settings OFF RS 422 with 100 Ohm terminating resistor OFF RS 422 without termination OFF Table 3 Assignment of the IF1 DIL switch __ 1B a RS422 __ ar RS485 z s2 A O ly z Protection Circuit 0 4 20mMA OUT D A Converter IGND gt Protection Circuit Interface Board IF1 RS422 485 Al Fig 12 Principle IF1 RS422 circuit diagram with analog output option ASTECH 2009 Page 25 VLM 250 User Manual Connection 6 5 IF2 interface card The optional IF2 interface card provides two high resolution pulse outputs each with 2 phases and a frequency range of 0 4 Hz up to 25 kHz Resolution and error each equal 20 ns The maximum cable length is 50m Additionally an opto isolated analog output 16 bit resolution 4 to 20 mA or 0 to 20 mA can be assembled 2 o 3 A x D DUT4 S oa 3 a re DUT
90. t is programmed by means of the Trigger parameter H or L level or edge and implements the start and stop of the device internal length integration unit The output channels can be synchronised to the trigger e g SIOUTPUT 1 parameter switches the data output of the serial S1 interface to be synchronised with the trigger In the case of the internal laser light barrier option for the measurement of individual parts IN2 is connected to the laser light receiver integrated in the measuring device In devices of the S series the IN2 input serves to switch on the synchronisation clock A The signals for the inputs must be de bounced Mechanical contacts switches and relays may be used only if the signals are switched when the measured object is at a standstill 6 4 IF1 interface card The optional IF1 interface card provides depending on the components an additional interface serial interface 2 RS 232 with handshake signals RS 422 RS 485 each opto isolated and or an analog output 16 bit resolution 4 to 20 mA or 0 to 20 mA 3 The wiring example shows connections to PNP push pull and NPN outputs ASTECH 2009 Page 24 VLM 250 User Manual Connection as el 510500 O D502 D500 I DUT E I GND eW1NZ TAI 280 HOALSY Fig 11 IFl interface card The DIL switches serve to switch over between RS485 or RS422 and to switch the terminating resistors There are no DIL
91. t none of the output channels are updated i e pulse analog and serial specifications are not possible The OFFLine command starts the offline measurement The optional T parameter causes a trigger event to be awaited refer to Trigger command A maximum of 15296 values 64 bit each can be accommodated Each value is filed as a time and measuring value 32 bits each The BUSY LED yellow is on during the measurement The measured data is only overwritten after a restart In the event of a power failure the measurements are lost A premature abort is possible with ESC An abort with ESC or at full memory causes an error message to be output refer to Error messages in appendix Syntax OFFLine T T wait for trigger event 9 7 2 The OF Factor command This command can be used to adjust a scaling factor It is thus for example possible to use the value 60 for the output of a measuring velocity OFF Value V in m min The scaling factor is however only taken into consideration in conjunction with output with OF FRead Syntax OF Factor n n 0 000001 23 10 6 9 7 3 The OFF Measure command This command sets the duration of the offline measurement in seconds Syntax OFFMeasure n n 1 65535 Unit s 9 7 4 The OF FOutput command This command determines whether the measuring value is to be output to the memory in a selectable time interval refer to OF FTime command when a trigger event occurs refer to Trigger
92. ter and clearly marked in the text with the F S symbol The devices of the A L and D series are fully compatible and can be combined into VLM 250 FA or VLM 250 FD devices Option h has been specifically designed for use on glowing surfaces Do not operate the measuring devices at velocities that are above the range specified in the data sheet as this could result in inaccurate readings Please note that the maximum permissible velocity is directly affected by the Direction parameter The Vmax parameter must thus be adjusted to match the actual maximum plant velocity A safety margin of 10 is already taken into account in the device 3 1 VLM 250 A series The VLM 250 A caters for a working distance of 185 7 5 mm It is designed as a universal device catering for the measuring of a wide range of different materials The device can be automatically adjusted to the reflection colour and structure of the material surface in an extremely wide range By altering the DIRECTION parameter see chapter Programming the working distance range can be extended i e the range in which the material to be measured must be located The extended working distance range of the A series is 185 15 mm 3 2 VLM 250 F series The devices of the F series have been developed for highly dynamic velocity measurements in the production process and are especially well suited for closed control loops The F series has been upgraded with an averaging
93. tput In the case of format specifications space characters are used as fillers If the value exceeds the possible number of the format specifications the necessary number of places is output The decimal point and a possibly existing sign character only for negative figures also occupy one place The standard end identifier of the output string is CR LF 13 10 or ODH OAH With the parameter T it is possible to replace the end identifier on the following string The characters are enclosed in apostrophes or specified by the appropriate ASCII Code for example T A 10 for A LF or 742 for or T 13 10 for CR LF A maximum of two characters is permitted The ASCII code must always be specified in decimals 9 5 3 The S Interface command The S Interface command configures the serial interface Baud rate type of protocol and parity are set All parameters can be set individually or simultaneously The sequence of parameters is of no significance All unspecified parameters are reset to the preset values no protocol no parity The format is determined as 8 data bits and 1 stop bit If the parity is activated the 8th data bit is replaced by the parity bit A parity error is indicated by E11 S1 parity and a buffer overflow by E12 S1 buffer overflow see Error messages in the appendix Syntax SIInterface n c c n c see below For the Baud rate the following values are possible n 0 600 1200 2400 4800 9600 19200 3840
94. ut of phase by 90 is provided refer also to Programming of the pulse output The outputs are designed as 5 V driver steps 74ACT04 interface driver OUT4 is the pulse output A2 OUT4 is A2 OUT5 is B2 OUTS is B2 OUT6 is A3 and so on The maximum output current is 24 mA per channel The maximum cable length for asymmetrical operation reference potential O GND is 200 m for output frequencies below 50Hz it is 500 m The card can be used to drive RS 422 outputs with a terminating resistor of 100 Ohm In this case the pick off is symmetrical between OUT and OUT while the O GND is not connected When using twisted pair shielded cables e g CAT5 the maximum cable length for RS 422 is 500 m LN The outputs of the IF2F 5V interface card are only protected against ESD but not against surges A UT4 UT4 UT5 UT5 UT6 UT6 UT7 UTZ O GND O GND putput 5 Uplt p 3 y 5 FBT bAT oF cus UF ZWIN NS ACAI 2000 0000 Dd nm m D x N I GND Fi m g 17 IF2F 5V interface card ASTECH 2009 Page 28 VLM 250 User Manual Connection Optoisol Highres two 5V 24mA Tac Driver EE Channel O GND Pulse Outputs OUT6 OUT6 74ACT04 0 4 20mA_ IOUT o D A Converter ___ IGND y Protection Circuit Interface Board IF2F 5V Option Al Fig 18 Principle IF2F 5V
95. x 10 1 3 ECC control commands Meaning On off Measuring rate 1 Measuring rate 2 Indicates ECC parameters Table 19 Commands for ECC control 10 1 4 Pulse output commands On off INCFactor Scaling factor s INCOutput Time or trigger controlled output INCValue Indicates the parameters Table 20 Commands for pulse output 10 1 5 Commands for output via serial interface S1 Meaning On off SiFormat Output format SIInterface Settings for the serial interface Time or trigger controlled output Output time Indicates the S1 parameters Table 21 ASTECH 2009 Commands for serial interface S1 Possible values 0 off 1 on 0 99 0 99 0 231 104 0 0001 23 10 4 Possible values 0 off 1 on OUT1 2 2 on IF2 IF2F 3 on OUT1 2 IF2 0 000001 231 10 6 3 values for IF2 IF2F from Firmware V 7 3 also negative V Velocity R Measuring rate Possible values 0 off 1 on See description See description 0 Time 1 Trigger 5 65535 ES Default value 0 Default value 1 111 Default value V 60 6 2 mmin 9600 N X Page 66 VLM 250 User Manual Appendix 10 1 6 Commands for output via serial interface S2 Meaning Unit Possible values Default value On off O off 1 on S2Format _ Output format See description VLU RT42 S2Interface Settings for the serial See descripti

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