a68 ad,user manual (large)
Contents
1.2. KO K4 Buffer address DO K2 0 Number of channels D1 H200 Loaded simmultaneously 1 Averaging processing specification D2 KO into buffer addresses 0 3 2 1 averaging time count D3 K1000 3 CH2 averaging time count 4 CH3 averaging time count o qe ee The above example sets the number of channels to 2 i e DO specifies channel 2 for count averaging i e D1 and sets channel 2 count setting to 1000 i e D3 The A68AD is located in the main base in the slot with head element number X Y CO 6 PROGRAMMING MELSEC A The initial data may also be written using individual TO type instructions for each buffer address in this case always execute in the following order Start v Set number of channels Set averaging time or averaging count v Averaging processing specification v Read of digital output value Fig 6 1 Initial Setting Procedure When this procedure is used the previous example must be programmed as follows KO K2 Ki TOP H000C Ki TOP H000C K3 1000 K1l 4 HOOOC K1 M200 1 i e The count setting K1000 is loaded into buffer address 3 before averaging processing specification M200 is loaded into address 1 If this order is changed a write in error may occur This will cause the run LED on the A6
3. 5 1 5 1 3 Maintenance and 5 1 na sd andans dees a ia a a 6 1 6 8 6 1 initial Setting ab ie te 6 1 6 2 gt Programming Instructions ote ree Ra na aee d n E tede 6 3 6 2 1 Basic programs for read and write een 6 3 6 2 2 Setting the number of channels sse nnne 6 5 6 2 3 Setting of averaging time or averaging count sse 6 5 6 2 4 Averaging processing 6 5 6 2 5 Read of digital output value nennen nnne nnne 6 6 6 2 6 Read and reset of write data error 4 6 6 6 2 7 X Application circuit examples 6 7 TEST OPERATION AND CALIBRATION nennen nanna 7 1 7 3 Offset Gam SEN 25 m Ct hee 7 1 7 2 Checks before Staring 5 o a ee de 7 3 8 TROUBLESHOOTING andi nanna a an sinn aaa si ina na bla a alas nds 8 1 8 7 8 1 Wite Data Error Gode et re etti Eee a again 8 1 8 2 Tro bleshootlng dee niue odas 8 2 8 2 1 Troubleshooting flow chart essen eene nere nnns 8 2 8 2 2 Flow chart used when RUN LED has flickered een 8 3 8 2
4. Check the wiring method for analog input voltage or current of A68AD Check if offset gain setting is proper v Disconnect the wiring of analog input of A68AD input voltage by use of stabilizin power or battery and monitor digital output value A68AD failure NO If digital output value proper External wiring is affected by noise Examine grounding method MELSEC A 8 TROUBLESHOOTING MELSEC A REMARKS The following contents are written into D9008 when an error has occurred during execution of the FROM or TO instruction to the A68AD Contents BIN value of Special Register D9008 CPU Status Error and Cause FROM and TO instructions cannot b executed Hardware failure of A68AD special function module CPU unit or base unit When the FROM or TO instruction has been executed access has been made to the special function module but no answer is returned The accessed A68AD special function module has failed Access has been made FROM or TO Stop instruction has been executed to a Continuous slot where the A68AD special func operation can be tion module is not loaded performed by The content of FROM or TO instruc the setting of tion is incorrect or the stage number parameter setting of extension base unit is incorrect 8 TROUBLESHOOTING 8 2 5 The number of channels cannot be written
5. R l 15 x D p Ms 250 FG 1 shield OX ANALOG X GND Ex 5 1 For the cable use a two core twisted shielded wire 2 Indicates the input resistance of the A68AD 3 For current input be sure to connect the terminals V and 1 4 If noise or ripple is generated at the external wiring connect a capacitor of approximately 0 1 to 0 47 uF between terminals V and COM 5 If there is excessive noise ground the unit The FG terminal of the A68AD and the FG terminal of the power supply unit are not connected together internally 5 1 3 Maintenance and Inspection The A68AD does not require any specific inspections but in order to ensure that the System is always used under the optimum conditions follow the inspection point in the CPU module User s Manual 5 1 6 PROGRAMMING 6 PROGRAMMING 6 1 Initial Setting MELSEC A Before analog to digital conversion begins it is necessary to write certain initial data to the buffer memory This data consists of the number of channels used and specification of the sampling method required See section 3 4 1 The most convenient way to write this data to the buffer memory is to use a single TO type instruction as shown in the example below M9038 7 MOV K2 DO MOVP H200 D1 MOVP 02 MOVP 1000 03
6. Read any error step number with peripheral equip ment Error occurs NO MELSEC A Flow chart used when data such as the number of channels cannot be written at the TO instruction Monitor D9008 by use of peripheral equipment YES Read the write data error code and take corre sponding corrective action D9008 is 40 NO YES D9008 is 41 NO D9008 is 46 Check the I O number of A68AD and the number of TO instruction Check the stage number setting switch of extension base unit A68AD failure CPU module failure NO Is CPU module normal Base unit failure Is base unit normal YES A68AD failure Please return the module to the nearest sales representative together with details of trouble APPENDIX APPENDIX External View 4 2 0 17 lt hannnnnananannanannnnn Printed circuit board P nooo MELSEC A 0 12 x 0 5 0 02 6 0 24 Terminal screw nnn 7 2 0 28 Assan RUN cH amp s 557 OFFSET Cj 6 0 24 106 4 17 131 5 16 APP 1 37 5 1 48 gt Unit mm inch
7. Applicable models AOJ2CPU A1CPU A1NCPU A2CPU A2NCPU A2CPU S1 A2NCPU S1 A3NCPU A68AD can be loaded into any slot of base unit with the exceptions given below 1 If possible avoid loading the A68AD into an extension base unit without a power supply module type AS extension base units because the power supply may be insufficient If the A68AD is loaded in such a base unit see the CPU module User s Manual for details on selecting an appropriate power supply module and extension cable 2 In a data link system the A68AD can be loaded at a master station localstation or remote I O station but the CPU modules that can be used at master stations and local stations are restricted to those indicated below The same restrictions apply for coaxial link and fiber optic link systems Master station A1CPUP21 R21 A1NCPUP21 R21 A2CPUP21 R21 A2NCPUP21 R21 A2CPUP21 R21 S1 A2NCPUP21 R21 S1 21 21 21 21 21 21 Local station AO0J2C PUP23 R23 A1CPUP21 R21 A1NCPUP21 R21 A2CPUP21 R21 A2NCPUP21 R21 A2CPUP21 R21 S1 A2NCPUP21 R21 S1 21 21 A3NCPUP21 R21 A3HCPUP21 R21 3 When use with A3CPU P21 R21 cannot install at the final slot of 7th extension base For the processing time reading writing when using the A68AD in a data link system refer to the Data Link User s Manual 2 3 Precautions when Using One A68AD Module with Multiple Chann
8. Correction Sections 2 1 3 2 2 4 2 Apr 1988 IB NA 66054 F Correction Sections 5 2 1 5 3 1 May 1988 IB NA 66054 G Applicable CPU model names are reviewed A1N A2N A2N S1 ASNCPU A3HCPU Jul 1988 IB NA 66054 H Instructions for Strategic Materials added Mar 1989 IB NA 66054 I Correction Section 5 2 1 Jul 1989 IB NA 66054 J Addition Section 4 2 INTRODUCTION Thank you for choosing the Mitsubishi MELSEC A Series of General Purpose Programmable Controllers Please read this manual carefully so that the equipment is used to its optimum A copy of this manual should be forwarded to the end user Manual A68AD USERS 1 66054 Section Manual page File name Designer data file name NO Revision Revision Contents Contents Intro Intro important Important Safety Safety 1 1 1 010000jc 2 2 1 to 2 2 020000jc P4d2 dc dd df dg dh dj 3 3 1 030000jc 3 3 to 3 10 030200ac g3 9 3 11 to 3 15 030300jc 4 4 1 to 4 2 040000jc P4d2 5 5 1 050000jc P4d4 6 1 to 6 7 060000jc L6 7n L6 2 L6 5 L6 4 L6 6a L6 6b L6 7 6 7 1 to 7 3 070000ac 8 1 to 8 7 080000ac APP 1 A10000ac Appd 2 CONTENTS GENERALE DESCRIPTION ss in a a fa fann Data 1 1 SYSTEM CONFIGURATION 2 5 1 recien nn s ndi an ns sim
9. SPECIFICATIONS MELSEC A 5 Write data error code Address 34 When data is read from the programmable controller CPU the A68AD makes a data range check for the number of channels used once only When one of the values is outside the range the A68AD sets an error code in 16 bit binary For details of error codes refer to Section 8 1 page 8 1 To reset an error code write 0 from the programmable controller CPU When several error codes have occurred the data error code witch has been detected by the A68AD first is stored The other errors are not stored If an error is reset without remedying the error the data error code is set to 0 and the RUN LED of A68AD stops flickering Section 4 2 on page 4 2 3 15 4 HANDLING MELSEC A 4 HANDLING This chapter describes the handling instructions nomenclature maintenance and inspection of the A68AD 4 1 Handling Instructions 1 Protect the A68AD and its terminal block from impact 2 Do not touch or remove the printed circuit board from the case 3 When wiring ensure that no wire offcuts enter the module and remove any that do enter 4 Tighten terminal screws as specified below TighteningTorque Range Screw kg cm terminal block terminal screw screw 5108 terminal block mounting screw M4 screw 8 to 14 5 To load the module onto the base press the module against the base so that the hook is securely lock
10. 3 Flowchart used when RUN LED has turned Off 00 0000 8 4 8 2 4 Flowchart used when digital output value cannot be read 8 5 8 2 5 chart used when data such as the number of channels cannot be written 8 7 mE APP 1 External At M S el Eee att APP 1 1 GENERAL DESCRIPTION MELSEC A 1 GENERAL DESCRIPTION This User s Manual describes the specifications handling programming procedures etc for the A68AD analog digital converter module hereinafter referred to as A68AD which is used in combination with the MELSEC A series CPU module Refer to the following manuals as necessary when using the A68AD A1N A2N User s Manuals ACPU Programming Manual A0J2 CPU Module I O Module User s Manual A0J2 Programming Manual Data Link System User s Manual In this manual the allocation numbers of the A68AD as seen from the CPU are those when a building block type CPU is used and the A68AD is loaded in slot No 0 of the main base unit If the A68AD is loaded in a slot other than slot No 0 or AOJ2CPU is used determine the allocation numbers of the A68AD using the allocation method in the Programming Manual The following generic terms are used for CPU types in this manual 1 PC CPUs A1 A2 A2 S1 ASCPU P21 R21 A1N A2N A2N S1 ASNCPU P21 R21 A3HCPU
11. P21 R21 AOJ2CPU P23 R23 2 Building block type CPUs A1 A2 A2 S1 ASCPU P21 R21 A1N A2N A2N S1 ASNCPU P21 R21 A3HCPU P21 R21 3 Compact type CPUs A0J2C PU P23 R23 4 ACPU A1 A2 A2 S1 ASCPU P21 R21 A1N A2N A2N S1 ASNCPU P21 R21 A3HCPU P21 R21 AOJ2CPU P23 R23 2 SYSTEM CONFIGURATION MELSEC A 2 SYSTEM CONFIGURATION 2 1 Overall Configuration The overall configuration is shown Fig 2 1 Type Type Building type CPU module Compact type CPU module 9000000000008 El po na A38B 2 01 A35B Type A68AD A0J2C03 A32B A0J2C10 Main base unit A D converter module cable LA ACO6B Type AC12B Type AC30B Extension cable A0J2 module A68B A68B A65B A65B A0J2C04B Type A58B A58B Type AoJeC10B A55B A55B Extension base unit Extension base unit Extension cable Fig 2 1 Overall Configuration Diagram 2 1 2 SYSTEM CONFIGURATION MELSEC A 2 2 Applicable System The A68AD can be used with the following CPU modules
12. e value is output to the e BCD DO K4Y118 24 MEA 6 PROGRAMMING Execution command a Xi MELSEC A 3 Circuit which changes a gain to 4 2 1 2 and 1 4 times by program The digital output values are changed to the following gains all digital value must be gt 0 Channel 1 4 times Channel 2 2 times Channel 3 1 2 times Channel 4 1 4 times Digital output values of channels 1 to 4 e FROM HO K10 DO K4 which have been converted from analog values are read to the DO to 3 The value of DO is shifted 2 bits leftward M SFL DO K2 the digital output value of channel 1 is quadrupled The value of D1 is shifted 1 bit leftward and the SFL D1 MEE digital output value of channel 2 is doubled The value of D2 is shifted 1 bit rightward and the SFR 02 K1 digital output value of channel 3 is halved The value of D3 is shifted 2 bits rightwar SFR D3 K2 and the digital output value of channel 4 is quartered 7 TEST OPERATION ANDCALIBRATION 7 TEST OPERATION ANDCALIBRATION 7 1 MELSEC A This chapter describes offset gain setting See also the A CPU User s Manual Offset Gain Setting Change the output characteristics as follows The unit is factory set to an offset value of 0 V and a valueof 5 V C Connect terminals
13. of buffer memory This section describes the contents and data configuration of buffer memory for each item indicated in Section 3 4 1 page 3 12 1 Number of channels Address 0 a At power on the number of channels is set to 8 b In order to reduce sampling time the number of channels can be changed by in the sequence program For details refer to Section 6 2 2 on page 6 4 Example CH1 Used CH2 Vacant By setting the number of channels to 4 the sampling time is changed CH3 Used to 2 5ms x 4 10 ms CH4 Used CH5 Vacant CH6 Vacant CH7 Vacant CH8 Vacant Although the number of channels at power on is set inside the A68AD it is not written to address 0 of the buffer memory When 0 is written for the number of channels the A68AD regards the number of channels as 8 when performing A D conversion processing When a number of channels other than 0 to 8 is written setting error occurs and the buffer memory is rewritten However the A68AD performs A D conversion processing for the number of channels set previously 2 Averaging processing specification Address 1 a When the power is turned on and the A D conversion ready signal of A68AD is on all channels are set to sampling processing b For selection of sampling processing or averaging processing use address 1 of the buffer memory B15 B14 B13 B12 B9 B8 B7 B6 B5 B4 B2 Bi BO CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH8 C
14. off Digital output value cannot be read Section 8 2 4 Flow chart used when digital output value cannot be read Section 8 2 5 Flow chart used when data such as the number of channels cannot be written Data such as the number of channels cannot be written 8 TROUBLESHOOTING MELSEC A 8 2 2 Flow chart used when RUN LED has flickered RUN LED flickers Read write data error code from buffer memory Check the number of channels Compare this with the number of channels designated in Buffer Address 1 Channel setting error Setting error of averaging time or averaging count NO Please return the module to the nearest sales represen tative together with details of trouble Check write data Check if averaging time or averaging count has been set before averaging processing is specified 8 TROUBLESHOOTING 8 2 3 RUN LED turns off Is the circuit open NO Flow chart used when RUN LED has turned off across test terminals 1 and 3 YES Open the circuit across test terminals 1 and 3 y Monitor the input signal of A68AD watch dog timer error Watch dog timer NO RUN LED turns on error signal OFF Since possible cause is insufficient power capacity calculate current consump
15. present on the analog signal Trace C represents the digital output obtained when time based averaging is used In this case the number of channels was taken as 4 and the sampling time as 100 ms Hence the processing count from equation 1 is 100 4 2 5 10 samples 3 SPECIFICATIONS MELSEC A 10 samples are therefore taken every 100 ms and an average calculated This average is then output as a digital value while the CPU takes the next 10 samples Note that the allowable time setting range is 20 10000 ms which is equivilant to 2 1000 samples with 4 channels Trace D represents the digital output obtained when count based averaging is used Again the number of channels was taken as 4 the count setting was 25 the processing time from equation II is 25 x 4 x 2 5 250 ms One sample is therefore taken every 10 ms and after 25 samples have been taken the average value is used for the digital output while the next 250 are being sampled Note that the allowable count setting range is 1 4000 which is equivilant to 40 40000 ms with 4 channels 3 10 3 SPECIFICATIONS MELSEC A 3 3 I O List with Respect to Programmable Controller CPU The I O signals of the A68AD with respect to a programmable controller CPU are as indicated below Numbers for X and Y are determined by the slot occupied by the A68AD and the number of points of the other units The I O numbers indicated below are us
16. voltage characteristics for three different offset gain combi nations The offset gain setting in the figure at left is as follows Practical analog 1 When the offset value is 0 V and the gain vale is 2 5 V input range the characteristic is as indicated by 1 Example 2047 When the analog input value is 3 V the digital output value is 1200 When the analog input value is 3 V the digital output 1000 value is 1200 Digital 2 When the offset value is 0 V and the gain value is 5 V output value the characteristic is as indicated by 2 0 Example When the analog inpu value is 3 V the digital output value is 600 When the analog input value is 3 V the digital output value is 600 3 When the offset value is 5 V and the gainvalue is 10 V 0 the characteristic is as indicated by 3 Example Analog input voltage V When the analog input value is 3 V the digital output value is 533 When the analog input value is 3 V the digital output value is 133 Fig 3 2 Voltage Input Characteristic When the input voltage is in the range from 10 to0 to 10 V the maximum resolution and overall accuracy are within the quoted range of performance specifications However if this range is exceeded resolution and accuracy will be impaired If an analog input corresponding to a digital output value of more than 2047 or less than 2048 is applied the digital output value will not exceed 2047 or
17. 000 lt 5 mV so the digital value does not increase decrease in units of one count Fig 3 4 Voltage Input and Digital Output Value Digital output value 4 98 5 00 more at top to to to to Less than 4 98 5 00 5 02 19 84 19 86 19 88 19 90 19 92 19 94 19 96 20 00 8t bottom 2 20 to to to to to to to to 19 86 19 88 19 9019 92 19 94 19 96 20 00 20 02 For 1 and 2 since gain value offset value 1000 lt 2 uA the digital value does not always increase or decrease in units of one count Fig 3 5 Current Input and Digital OutputValue 3 SPECIFICATIONS MELSEC A 3 2 3 Digital system The digital output value of the A68AD is determined by the following 1 conversion characteristics Offset value L Gain value The digital output value depends on the offset value and gain value which have been set in test mode 2 A D conversion system Sampling processing Averaging processing in terms of count 1 to 4000 times Averaging processing Averaging processing in terms of time seeds dede da eoa Eee de dan 20 to 10000 ms 1 Sampling processing The analog input values are converted to digital output values one by one and the digital output values are stored in the buffer memory 2 Averaging processing The A68AD makes the A D conversion for any channels to whi
18. 1 and 3 to put the unit into TEST mode Set the channel select switch on the front of unit to th required channel number Do not set to channel 0 or 9 Voltage adjustment NO Current ves Voltage Apply offset voltage to the input terminal of channel to be calibrated and set the OFFSET switch to the up position When the RUN LED turns on the applied voltage is stored into the A68AD as the offset value Apply gain voltage to the input terminal of channel to be calibrated and set the GAIN switch to the up posi tion When the RUN LED turns on the applied voltage is stored into the A68AD as the gain value Switch on the required offset current to the channel to be calibrated and set the OFFSET switch to the up position When the RUN LED turns on the applied current is stored into the A68AD as the offset value Switch on the required gain current to the channel to be calibrated and set the GAIN switch to the up position When the RUN LED turns on the applied current is stored into the A68AD as the gain value Have the setting of all channels been completed Open the circuit across TEST terminals Complete 7 TEST OPERATION ANDCALIBRATION MELSEC A The offset value and gain value are stored in the A68AD and are not erased if the power is turned off Perform the offset gain setting with the CPU in stop mode Wh
19. 2048 Do not apply 15 V or more This will damage the module In offset gain setting the offset value should always be less than the gain value If the offset value is greater than or equal to the gain value the digital output value will be unpredictable 3 SPECIFICATIONS 2047 1000 Digital output value MELSEC A 2 Current input characteristic Fig 3 3 shows the current characteristics for two different offset gain combi nations Practical analog input range The offset gain setting in the figure at left is as follows 1 When the offset value is 0 mA and the gain value is 5 mA the characteristic is as indicated by 1 Example When the analog input value is 7 mA the digital output value is 1400 When the analog input value is 3 mA the digital output value is 600 2 When the offset value is 4 mA and the gain value is 20 mA the characteristic is as indicated by 2 Example When the analog input value is 7 mA the digital output value is 187 When the analog input value is 3 mA the digital output value is 437 When the input current is in the range from 20 to 0 to 20 mA the maximum resolution and overall accuracy are within the quoted range of performance specifications However if this range is exceeded resolution and accuracy will be impaired If an analog input corresponding to a digital output value of more than 2047 or less than 2048 is appl
20. 8AD to flicker Error status may also be found by monitoring buffer memory address 34 This error occurs because the A68AD is normally in run mode If averaging processing specification is made the A68AD immediatly looks for the relevant averaging data If this data has not already been written to the unit an error is registered 6 PROGRAMMING 6 2 Programming Instructions MELSEC A This section describes basic programs for read and write operations setting the number of channels the specification of averaging processing read of digital output value and write error code and application examples For details on instructions refer to the ACPU Programming Manual and the A0J2CPU Programming Manual When the module is used in a remote I O station refer to the Data link User s Manual 6 2 1 Basic programs for read and write 1 Read from A68AD FROM FROMP DFRO DFROP instructions FROM instruction execution condition m ne n3 A D conversion ready Description Usable Device Number Upper 2 digits of head I O number assigned to A68AD K H Head address of buffer memory which stores data K H Head number of device which will stored read data D W Number of words of data to be read With AOJ2CPU P23 R23 only T C and D can be used K H Example To read the 1 word data from address 10 of the buffer memory
21. D is equipped with a buffer memory which is not battery backed for the communication of data with a programmable controller CPU Explanation will be given for the assignment and data configuration of this buffer memory For the read and write operation procedures by the sequence program refer to Chapter 6 page 6 1 3 4 4 Assignment of buffer memory Address Decimal 0 Number of channels Averaging processing specification 2 CH1 averaging time count 3 CH2averaging time count 4 CH3 averaging time count 5 CH4 averaging time count 6 7 8 Read and write from CPU CH5 averaging time count CH6 averaging time count CH7 averaging time count 9 CH8 averaging time count 4 10 CH1 digital output value 0 t 11 CH2 digital output value 12 CH3 digital output value 13 CH4 digital output value Read from CPU 14 CH5 digital output value 15 CH6 digital output value 16 CH7 digital output value 17 CH8 digital output value 18 ye i aie Not used to 33 _ Read and write from CPU 34 Write data error code PE IEEE S All 16 bit data The addresses 10 to 33 of buffer memory are areas exclusively used for reading from a programmable controller CPU Writing to these addresses will cause mis operation 3 12 3 SPECIFICATIONS MELSEC A 3 4 2 Contents and data configuration
22. H5 CH4 CH3 CH2 CH1 CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 1 0 1 0 1 501 SN 2 Y Specification of channel Specification of time count averaging for averaging processing Initial setting command X1 TOP HO Ki H501 Ki Set averaging processing specification at the above value 6 2 5 Read of digital output value 1 The digital output value is read in 16 bit signed binary 2 Program example To read the digital output values of channels 1 to 3 to the D5 to 7 Digital output value read command a FROM K10 D5 K3 E 6 2 6 Read and reset of write data error code 1 Any error code is set at address 34 of the buffer memoryin binary For details refer to Section 8 1 page 8 1 2 Only the first error code to occur is stored For details refer to Section 3 4 2 page 3 13 3 Reset the error code from the programmable controller CPU 4 Program example a To read the error code to D3 and output it to Y100 to 107 BCD Error code read command FROM H0 K34 D3 K1 Error code is read to D3 BCD D3 K2Y100 Error code is output to the Y100 to 107 in BCD code b Toresetthe error code Error code reset command X1 TOP HO K34 KO 0 is written address 34 of buffer memory and err
23. H7 CH6 CH4 CH3 CH2 CH1 Specification of channel for which averaging Specification of time count processing will be performed 1 Averaging processing 1 Time averaging 0 Sampling processing 0 Count averaging 3 13 3 SPECIFICATIONS MELSEC A When averaging processing is not specified sampling processing is set without regard to the specification of time count 3 Averaging time averaging count Addresses 2 to 9 a At power on the averaging time and averaging count are set to 0 b The setting ranges are as indicated below Averaging processing in terms of count 1 to 4000 times Averaging processing in terms of time 20 to 10000 ms If a value outside the above range has been written setting error occurs and the buffer memory is rewritten However the A68AD performs A D conversion processing at the averaging time or count previously set 4 Digital output value Addresses 10 to 17 The digital output value is expressed in 16 bit signed binary within the range from 2048 to 2047 B15 B14 B13 12 B9 B8 B7 Be B5 B4 B2 Bi BO 1 a 0 Data section B11 to B14 change to 1 when the sign is negative 1 at B15 and to 0 when it is positive 0 at B15 A negative digital value is expressed in 2 s complement Sign bit 1 Negative 0 Positive 3 14 3
24. V instruction the file register data will become FFFF and use of this data will cause malfunctions Take care not to use file registers that are outside the range when designing programs For details on instructions refer to the Programming Manual Cautions on Mounting N CAUTION Use the PC in an environment that conforms to the general specifications in the manual Using the PC in environments outside the ranges stated in the general specifications will cause electric shock fire malfunction or damage to deterioration of the product e Make sure that the module fixing projection on the base of the module is properly engaged in the module fixing hole in the base unit before mounting the module Failure to mount the module properly will result in malfunction or failure or in the module falling e Extension cables should be securely connected to base unit and module connectors Check for loose connection after installation A poor connection could result in contact problems and erroneous inputs outputs e Plug the memory card firmly into the memory card mounting connector Check for loose connection after installation A poor connection could result in erroneous operation Cautions on Wiring lt P DANGER e Switch off the external power supply before staring installation and wiring work Failure to do so could result in electrical shocks and equipment damage e After installation and wiring is compl
25. a MITSUBISHI ELECTRIC MELSEC A series Programmable Controller User s Manual A68 AD a MITSUBISHI ELECTRIC EUROPE B V FACTORY AUTOMATION SAFETY PRECAUTIONS Read these precautions before using When using Mitsubishi equipment thoroughly read this manual and the associated manuals introduced in this manual Also pay careful attention to safety and handle the moduleproperly These precautions apply only to Mitsubishi equipment Refer to the CPU module user s manual for description of the PC system safety precautions These SAFETY PRECAUTIONS classify the safety precautions into two categories DANGER and CAUTION Procedures which may lead to a dangerous condition and cause death or serious XP DANGER OC injury if not carried out properly N CAUTION Procedures which may lead to a dangerous condition and cause superficial to medium injury or physical damage only if not carried out properly 1 1 1 1 1 V Depending on circumstances procedures indicated by CAUTION may also be linked to serious results In any case it is important to follow the directions for usage Store this manual in a safe place so that you can take it out and read it whenever necessary Always forward it to the end user System Design Precautions lt P DANGER Safety circuits should be installed external to the programmable controller to ensure
26. ae cru 2 1 2 2 2 1 Overall Configuration ect etr inco uer iter een bara a gera ta riae tse 2 1 2 2 Applicable System aurea ER reed ari Rota 2 2 2 3 Precautions when Using One A68AD Module with Multiple 2 2 SPECIF CAT O N S 2 a ea LEE 3 1 3 15 3 1 General 3 1 3 2 Performance Specifications rana 3 2 3 21 Specifications iesse iet eto Eres 3 2 3 2 2 WO conversion characteristics eene 3 3 3 2 3 Digital VO system dedi Re I Ae mte E RUE i d e e Hee 3 7 3 3 I O List with Respect to Programmable Controller CPU sse 3 11 3 4 BUTTER Memory eas pee OVE DA ch bet er erts tees 3 12 3 4 1 Assignment of buffer memory 3 12 3 4 2 Contents and data configuration of buffer memory 3 13 4 1 4 2 4 41 Handling Instructions eter EET er ei ie 4 1 4 2 4 2 INS TAEL ATION i a ink a i 5 1 ra BR 5 1 5 1 1 Wiring instructions 5 1 5 1 2 Unit connection
27. ch averaging processing has been specified from the programmable controller CPU Using a preset count or a preset period of time an average is calculated excluding the maximum value and the minimum value and stored to the buffer memory If the processing count is specified as two or less sampling processing is applied 3 SPECIFICATIONS MELSEC A The A68AD may sample data in any one of three ways These sampling methods can be applied separately to any channel The sampling process is controlled by the A68AD s own CPU but must be specified from the programmable controller CPU This is fully explained in section 3 4 1 Method 1 Sampling Processing This is the most commonly used sampling procedure As the A68AD s CPU scans each channel the value appearing at that instant is written to the buffer memory as a digital value The timing of this sampling depends on the number of channels used and may be found from the following expression Processing _ Number of channels x 2 5 ms channel time used Where the maximum conversion speed is taken as 2 5 ms channel Example 1 Number of channels 5 Processing time 5 x 2 5 ms 12 5 ms Method 2 Averaging processing by specifying time In this case the CPU takes a number of samples of the data at each channel and than calculates the average value over the specified time period The number of samples taken depends on the number of channels and the time setting If is calculat
28. d cause serious accidents A circuit should be installed which permits the external power supply to be switched ON only after the programmable controller power has been switched ON Accidents caused by erroneous outputs and motion could result if the external power supply is switched ON first When a data link communication error occurs the status shown below will be established at the faulty station In order to ensure that the system operates safely at such times an interlock circuit should be provided in the sequence program using the communication status information Erroneous outputs and operation could result in an accident 1 The data link data which existed prior to the error will be held 2 All outputs will be switched OFF at MELSECNET Il 10 remote l Ostations 3 At the MELSECNET MINI S3 remote I O stations all outputs will be switched OFF or output statuses will be held depending on the E C mode setting For details on procedures for checking faulty stations and for operation statuses when such errors occur refer to the appropriate data link manual System Design Precautions N CAUTION e Do not bundle control lines or communication wires together with main circuit or power lines or lay them close to these lines As a guide separate the lines by a distance of at least 100 mm otherwise malfunctions may occur due to noise When file register R that are outside the range are read e g by a MO
29. e A value other than 0 to 8 has been set as the number 01 of channels A value other than 20 to 10000 ms has been set as an 71554 averaging time set value A value other than 1 to 4000 times has been set as an 15 averaging count set value Table 8 1 Types of Write Data Error Codes 010 4 51 8 of write data error code are used only to make differentiation between averaging time and averaging count respecively The individual numerals do not have any significance When an error has occurred check the write data error code reset the error code and then write the corrected data Refer to Section 3 4 2 on page 3 13 Example 1 Error code 32 has occurred Since the averaging time of channel 3 is wrong change the value to within the range 20 to 10000 ms 2 Error code 88 has occurred Since the averaging count of channel 8 is wrong change the value to within the range 1 to 4000 times 8 TROUBLESHOOTING MELSEC A 8 2 Troubleshooting This section describes simple troubleshooting procedures for use of the A68AD For problems relating to the CPU module refer to the A CPU User s Manual 8 2 1 Troubleshooting flow chart Section 8 2 2 Flow chart used when RUN LED has flickered RUN LED of A68AD flickers Section 8 2 3 Flow chart used when RUN LED has turned off RUN LED of A68AD turns
30. ed To unload the module push the catch on the top of the module and after the hook is disengaged from the base pull the module toward you 4 HANDLING MELSEC A 4 2 Nomenclature Module fixing hook A68AD Hook for fixing the A68AD to the base unit RUN CH zi e a RUN LED ANR Indicates the operating status of A68AD o Normal mode inn ON During normal operatio Flicker At write data error or AG8AD hardware error OFF 5V power off or watch dog timer error Test mode Test mode terminals ao ON When the OFFSET switch or GAIN switch isl e nee e is located at the ON position dE UE OFF When both the OFFSET switch e fe 5 switch is located at the OFF position 6 5 FG Z vl CHANNEL select switch l 100 LURA Used to select a channel for the offset adjustment and gain adjustment cl 18 No processing at positions 0 and 9 H COM 14 re 15 pr MEER OFFSET switch EE 1 SM ts At the ON position stores the applied analog input 20 value into the A68AD as offset value 21 con 22 5 L FG 23 Se GAIN switch 1 At the ON position stores the applied ana
31. ed as follows Time setting Processing count 1 Number of channels 2 5 ms i Example 2 Time setting 1000ms 4 channels 1000 4 2 5 Processing count 100 samples Where maximum conversion speed 2 5 ms channel Method 3 Averaging processing by specifying a number of counts This is similar to method 2 except that in this case the number of samples for the averaging process is specified The processing time may be found from the following expression 3 SPECIFICATIONS MELSEC A Processing _ Count Number of 25 setting X channels X 9 MS Example 3 Count setting 500 4 channels Processin time J 500 x 4x 2 5 500 ms ll Where maximum conversion speed 2 5 ms channel A tk Pe A a Nox B lig E x Average value calculated ee Roh g for 25 samples lt pg S8 E NA D V4 Average value calculated for 10 samples ha 0 100 200 300 400 500 600 700 Time ms Fig 3 6 Graph showing variations between output values for different sampling methods Refering to the graph in Fig 3 6 Trace A represents a steadily rising analog input signal Trace B represents the digital output obtained when method 1 sampling processing is used In this case the output value would be susceptible to variations due to any noise
32. ed by static dectricity so avoid handling them directly If it is necessary to handle them take the following precautions a Ground your body and the work bench b Do not touch the conductive areas of the printed circuit board and its electrical parts with non grounded tools etc Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential damage that may arise as a result of the installation or use of this equipment All examples and diagrams shown in this manual are intended only as an aid to understanding the text not to guarantee operation Mitsubishi Electric will accept no responsibility for actual use of the product based on these illustrative examples Owing to the very great variety in possible applications of this equipment you must satisfy yourself as to its suitability for your specific application REVISIONS Print Date Manual Number The manual number is given on the bottom left of the back cover Revision Nov 1985 IB NA 66054 A First edition Jan 1986 IB NA 66054 B Correction Sections 2 2 2 4 4 1 5 3 1 6 3 1 6 3 7 8 2 3 Addition Section 3 3 IMPORTANT Feb 1986 IB NA 66054 C Correction Sections 3 1 4 1 8 2 5 Aug 1986 IB NA 66054 D Deletion Sections 2 4 5 1 5 2 Correction Items are changed meeting AOJ2CPU Jun 1987 IB NA 66054 E
33. ed when the A68AD module is loaded into slot No 0 of the main base unit 1 Input signals with respect to programmable controller CPU 32 points from to 1F Input Signal Description Watch dog timer error 0 Turns on if watch dog timer error occurs in the A68AD A D conversion ready 1 Turns on when A D conversion is ready not in test mode after the power is turned on or the programmable controller CPU is reset Turns off in test mode 2 Used as an interlock when read or write is performed from the programmable controller CPU to the A68AD X2 to X1F Not used REMARK A D conversion ready indicates that a digital output value has been stored into the buffer memory after the A D conversion of all eight channels has been completed 2 Output signals with respect to programmable controller CPU 32 points from YO to 1F Output Signal Description YO to Y1F Not used IMPORTANT Outputs YO to Y1F are reserved they should not be used in the sequence program If these output signals are used turned ON OFF in a sequence program it will not be possible to guarantee correct functioning of the A68AD If the A68AD is used in a remote I O rack however inputs YOE and YOF may be set and reset in the sequence program to allow hand shaking with the CPU For details refer to the Data Link System User s Manual 3 11 3 SPECIFICATIONS MELSEC A 3 4 Buffer Memory The A68A
34. els The A68AD isolates the input terminals from the PC power supply by photocoupler but there is no isolation between channels When using multiple channels with a single module pay attention to the following points 1 Since the COM terminals for analog input are connected internally make the voltage level or current level for the COM terminals the same 2 If the COM terminals do not have the same level use another A68AD or isolate the channels externally for analog input 3 SPECIFICATIONS MELSEC A 3 SPECIFICATIONS This chapter describes the general specifications and performance specifications of the A68AD 3 1 General Specifications The general specifications of A68AD are indicated in Table 3 1 Item Specifications Operating ambient 0to5 temperature Storage ambient 20 to 75 temperature Operating ambient ae 10 to 90 RH no condensation humidity Storage ambient 10 to 90 RH no condensation humidity T Conforms Frequency Acceleration Amplitude Sweep Count i to 10 to 50 Hz m 0 075 mm 10 times d 55 to 150 Hz 1g 1 octave minute Shock resistance Conforms to JIS C 0912 10 g x 3 times in 3 directions By noise simulator 1500 Vpp noise voltage NoiSe durability 1 us noise width and 25 to 60 Hz noise frequency Eee 500 VAC for 1 minute across batch of DC external terminals and ground withstand voltage Insulation 5 MQ or
35. en the unit is set to test mode A D conversion is stopped on all channels Therefore use the A D conversion ready signal as an interlock Perform the offset gain setting within the range 10 to 0 to 10 VDC or 20 to 0 to 20m ADC If set outside this range the maximum resolution and overall accuracy may not be within the ranges specified 7 TEST OPERATION ANDCALIBRATION MELSEC A 7 2 Checks before Staring Checking Point Description Number Loading of unit Is the assignment correct Has offset gain been set for all channels used Offset gain Are set values correct setting Has the unit been returned to normal mod by opening the circuit across TEST terminals Are terminal block connections correct Connection Are terminal screws of terminal block to A68AD tightened securely Is the wire size correct Table 7 1 Points for Checking 8 TROUBLESHOOTING MELSEC A 8 TROUBLESHOOTING This chapter describes errors which may occur during the use of the A68AD and troubleshooting procedures for such errors 8 1 Write Data Error Code List The following three errors may occur during the write operation of the number of channels averaging processing specification averaging time and averaging count The numeric value of the error code enclosed in mW indicates the channel number for which the error has occurred Description Error Cod
36. eted be sure to attach the terminal cover before switching the power ON and starting operation Failure to do so could result in electrical shocks N CAUTION e Be sure to ground the FG and LG terminals carrying out at least class 3 grounding work with a ground exclusive to the PC Otherwise there will be a danger of electric shock and malfunctions e Carry out wiring to the PC correctly checking the rated voltage and terminal arrangement of the product Using a power supply that does not conform to the rated voltage or carrying out wiring incorrectly will cause fire or failure e Outputs from multiple power supply modules should not be connected in parallel Failure to do so could cause the power supply module to overheat resulting in a fire or module failure e Tighten the terminal screws to the stipulated torque Loose screws will cause short circuits fire or malfunctions e Make sure that no foreign matter such as chips or wiring offcuts gets inside the module It will cause fire failure or malfunction Connectors for external connections should be crimped pressure welded or soldered in the correct manner using the correct tools For details regarding crimping and pressure welding tools refer to the input output module user s manual A poor connection could cause shorts fire and erroneous operation Cautions on Startup and Maintenance lt P DANGER Do not touch terminals while the power i
37. ied the digital output value will not exceed 2047 or 2048 Do not apply 30 mA or more This will damage the module In offset gain setting the offset value should always be less than the gain value If the offset value is greater than or equal to the gain value the digital output value will be unpredictable 3 Relation between offset gain setting and digital output value The maximum resolution of the A68AD is 5 mV in voltage and 20 in current Maximum resolution may be found using the following expression Gain value offset value 1000 maximum resolution Fig 3 4 and 3 5 show the relation between the offset gain setting and the digital output value for the offset gain settings Fig 3 2 and 3 3 3 SPECIFICATIONS MELSEC A 2 475 2 480 2 485 2 490 2 495 2 500 M9re at top to to to to to to Less than 2 480 2 485 2 490 2 495 2 500 2 505 4 950 4 955 4 960 4 965 4 970 4 975 4 980 4 985 4 990 4 995 5 000 2 bottom to to to to to to to to to to to 4 955 4 960 4 965 4 970 4 975 4 980 4 985 4 990 4 995 5 000 5 005 9 850 9 865 9 880 9 895 9 910 9 925 9 940 9 955 9 970 9 985 10 000 3 5 10 to to to to to to to to to to to 9 865 9 880 9 895 9 910 9 925 9 940 9 955 9 970 9 985 10 000 10 015 For 1 gain value offset value 1
38. larger by 500 VDC insulation resistance tester across batch of AC resistance external terminals and ground Grounding Class 3 grounding Operating To be free from corrosive gases Dust should be minimal ambience Cooling method Self cooling Table 3 1 General Specifications REMARK One octave marked indicates a change from the initial frequency to double or half frequency For example any of the changes from 10 Hz to 20 Hz from 20 Hz to 40 Hz from 40 Hz to 20 Hz and 20 Hz to 10 Hz are referred to as one octave 1 JIS Japanese Industrial Standard 3 SPECIFICATIONS 3 2 Performance Specifications 3 2 1 Specifications MELSEC A Specifications Item Selection depends on input terminals Analbdinbut Voltage 10 to 0 to 10 VDC Input resistance 30 atog inp Current 4 to 20m ADC Input resistance 25 Q 20 to 0 to 20 also be used for current input Digital output characteristics ACPU 16 bit signed binary 2048 to 2047 Analog Input Digital Output 10 V 2000 5 V or 20 mA 1000 OVor 4mA 0 5Vor 12mA 1000 10V 2000 Maximum resolution Voltage 5 mV 1 2000 Current 20 1 1000 Overall accuracy Within 1 Accuracy with respect to the maximum value Maximum conversion speed Maximum 2 5 ms channel Absolute maximum input Voltage 15 Current 30 mA Numbe
39. log input 28 value into the A68AD as value 29 30 7 FG 31 B5 32 cl k 33 H COM 34 8 FG 35 36 ANALOG 38 GND AD O 10V lt 4 20 No Switches marked are valid only in test mode For details refer to Section 7 1 page 7 1 Terminal No Signal Name Terminal No Terminal No TEST 13 25 Not used 14 26 TEST 15 27 Not used 16 28 V 17 29 1 18 30 19 31 FG 20 32 V 21 33 1 22 34 23 35 FG 24 36 37 Not used 38 Not used H 3 5 INSTALLATION MELSEC A 5 INSTALLATION 5 1 Wiring 5 1 1 Wiring instructions Protect external wiring against noise with the following precautions 1 Separate AC and DC wiring 2 Separate main circuit and or high voltage wiring from control and signal wiring 3 Where applicable ground the shielding of all wires to a common ground point 5 1 2 Unit connection example 1 Voltage input Signal source 0 to 10 V SEI 15 15 ae al V 250 m ee lt d x 15 gu COM p FG 15V Me 1 shield GND 2 Current input Signal source 0 to 20 mA NN CH8 3 7 V
40. or code is reset 6 PROGRAMMING MELSEC A 6 2 7 Application circuit examples 1 Checking the magnitude of the analog signal Program which turns on Y100 when the digital output value of channel 1 is 700 or more turns on Y101 when it is between 600 and 700 and turns on Y102 when the value is negative Execution command xi FROM HO K10 DO K1 e Digital value of channel 1 is read to DO EMI a e PE pum K700 DO Y When digital output value is 700 or more ea 100 Y100 is turned on command X1 When digital output value is between 60 e lt K600 DO gt K700 DO 101 gt and 700 T 01 turned on Execution yy command AYN When digital output value is negative ee 0S0 TCU 102 102 is turned on 2 Digital display of analog signal Program which outputs the digital output value of channel 1 to Y110 to 11F in BCD and turns on Y120 when that value is negative ES FROM Ho DO 14 A n value of channel 1 which is read to Execution command X1 ES NN 2 gt KO DO 120 When DO is negative Y120 is turned on Negative value of DO is converted into a NEG DO Execution positive value is ae Th f DO i tput to the Y110 t
41. r of analo input points 8 channels module Insulation method Photocoupler insulation between output terminals and PC power Non insulated between channels Number of I O points 32 points Connection terminal 38 point terminal block Applicable wire size 0 75 to 2 mm Applicable tightening torque 7 kg cm Applicable solderless V1 25 3 V1 25 YS3A V2 S3 V2 YS3A terminal Internal current consumption 5 V 0 9A Weight 0 6 kg 1 32 Ib Table 3 2 Performance Specifications Analog input allowed for maximum resolution and overall accuracy is from 10 to 0 to 10 V or from 20 to 0 to 20 mA 3 SPECIFICATIONS MELSEC A 3 2 2 conversion characteristics conversion characteristics are dictated by the offset value and gain value set in test mode Fig 3 1 shows an example for voltage input Practical analog input range Gain value Offset va Digital output value 0 Analog input voltage V Fig 3 1 Conversion Characteristics REMARKS 1 The offset value is the analog input voltage or current value at which the digital output value is 0 Set the offset value in test mode 2 The gain value is the analog input voltage or current value at which the digital output value is 1000 Set the gain value in test mode 3 SPECIFICATIONS MELSEC A 1 Voltage input characteristic Fig 3 2 shows the
42. s ON This will cause malfunctions Make sure that the battery is connected properly Do not attempt to charge or disassemble the battery do not heat the battery or place it in a flame and do not short or solder the battery Incorrect handling of the battery can cause battery heat generation and ruptures which could result in fire or injury Switch the power off before cleaning or re tightening terminal screws Carrying out this work while the power is ON will cause failure or malfunction of the module N CAUTION In order to ensure safe operation read the manual carefully to acquaint yourself with procedures for program changes forced outputs RUNSTOP and PAUSE operations etc while operation is in progress Incorrect operation could result in machine failure and injury Do not disassemble or modify any module This will cause failure malfunction injuries or fire Switch the power OFF before mounting or removing the module Mounting or removing it with the power ON can cause failure or malfunction of the module When replacing fuses be sure to use the prescribed fuse A fuse of the wrong capacity could cause a fire Cautions on Disposal N CAUTION Dispose of this product as industrial waste IMPORTANT 1 Design the configuration of a system to provide an external protective or safety inter locking circuit for the PCs 2 The components on the printed circuit boards will be damag
43. that the system as a whole will continue to operate safely in the event of an external power supply malfunction or a programmable controller failure Erroneous outputs and operation could result in an accident 1 The following circuitry should be installed outside the programmable controller Interlock circuitry for the emergency stop circuit protective circuit and for reciprocal operations such as forward reverse etc and interlock circuitry for upper lower positioning limits etc to prevent machine damage 2 When the programmable controller detects an abnormal condition processing is stopped and all outputs are switched OFF This happens in the following cases e When the power supply module s over current or over voltage protection device is activated e When an error watchdog timer error etc is detected at the PC CPU by the self diagnosis function Some errors such as input output control errors cannot be detected by the PC CPU and there may be cases when all outputs are turned ON when such errors occur In order to ensure that the machine operates safely in such cases a failsafe circuit or mechanism should be provided outside the programmable controller Refer to the CPU module user s manual for an example of such a failsafe circuit 3 Outputs may become stuck at ON or OFF due to an output module relay or transistor failure An external circuit should therefore be provided to monitor output signals whose incorrect operation coul
44. tion Is power capacity OK YES Please return the module to the nearest sales representative together with details of trouble Recheck by loading and unloading the A68AD Respecify power supply module used MELSEC A 8 TROUBLESHOOTING 8 2 4 Digital output value cannot be read Read any error step number with peripheral equipment Error occurs NO Flow chart used when digital output value cannot be read at the FROM instruction YES Monitor D9008 by use of peripheral equip ment A68AD failure YES D9008 is 41 D9008 is 40 NO D9008 is 46 Check the I O number of A68AD and th number of FROM instruction Check the stage number setting switch of extension base unit CPU module failure NO CPU module is normal Base unit failure NO Base unit is normal YES A68AD failure Please return the module to the nearest sales representative together with details of trouble Check if the condition for executing FROM instruction is on Check if the address of buffer memory in th FROM instruction is the address of digital output value of channel from witch data will be read Read and check the setting number of channels for witch A D conversion will be made
45. to DO with the A68AD assigned to I O X130 to 14F and Y130 to 14F FROM instruction execution condition X131 FROMP H13 K10 DO K1 6 PROGRAMMING MELSEC A 2 Write to A68AD TO TOP DTO DTOP instructions TO instruction execution condition nt n2 S na o A D conversion ready Pr Usable Device Symbol Description Number nt Upper 2 digits of head I O number assigned to A68AD K H n2 Head address of buffer memory which will store data K H D Head device number or constant where data to be written is stored ES n3 Number of words of data to be written With AOJ2CPU P23 R23 only T C and D can be used Example To write 8 to address 0 of the buffer memory with the A68AD assigned to X60 to 7F and Y60 to 7F TO instruction execution condition 4 X61 H6 KO K8 K1 o When using A0J2CPU P23 R23 pay attention to the following points when writing a program 1 There are no FROMPTOP DFROP or DTOP instructions Use internal relays M for pulse conversion 2 Constant K H designations are not possible with TO instructions Set the data inT C and D devices for writing TO instruction execution condition a L 6 PROGRAMMING MELSEC A 6 2 2 Setting the number of channels 1 Set the n
46. umber of channels 1 to 8 2 Even if there is a vacant channel the number of channels must begin with channel 1 Set the number of the last channel used 3 Program example To set the number of channels 3 Initial setting command x Xi TOP HO KO K3 Ki E 6 2 3 Setting of averaging time or averaging count 1 Set the averaging time or averaging count to each channel for which av eraging processing will be performed 2 Be sure to set the averaging time or averaging count before specifying the averaging processing 3 Set value Time 20 to 10000 ms Set the time in units of 10 ms Count 1 to 4000 times 4 Program example To set the averaging time of 1000ms to channel 1 and the averaging count of 10 times to channel 3 Initial setting command xi HO K1000 Ki Write to channel 1 TOP HO K4 K10 K1 Write to channel 3 6 2 4 Averaging processing specification 1 Specify the channels for which averaging processing will be performed and also specify whether the processing method is count averaging or time averaging 2 Be sure to specify the averaging processing method after setting the averaging time and or averaging count 6 PROGRAMMING MELSEC A 3 Program example To specify time averaging processing at channel 1 sampling processing at channel 2 and count averaging processing at channel 3 CH8 CH7 CH6 C
Download Pdf Manuals
Related Search