Series I Transducer Interface and Display
Contents
1. 14 14 Span scale factor 03 04 Zero offset 254 254 Secondary Temperature Min 1504 1504 Secondary Max 04 04 Primary Pressure Min 100004 100004 Primary Max 26 Dec 19954 26 Dec 19954 Calibration Date QGX10K A0 QGX10K A0 Model Rev m e 01EW 04 Store Permanently The program CALIBRAT EXE provided on the program disk will download coefficients for both outputs and store them in EEPROM using a single DOS command See the README TXT file on the program disk for more information Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 10 7 3 Reference Based Coefficients Two sets of coefficient files are provided with Quartzdyne transducers that have a reference frequency output These are referred to as standard and reference based coefficients The files are distinguished by the DOS file extensions CFF and CFT are standard coefficient files for pressure and temperature respectively CRF and CRT are the respective reference based coefficient files The standard coefficients assume that an external frequency counter with its own calibrated time base ovenized or TCXO is used to count frequency Frequency errors in the time base will directly affect the transducer frequency readings and consequently the calibrated transducer output The reference based coefficients assume that the frequency counter uses the reference frequency of the transducer as its time base By using temperature information from the transduc2. data logging will resume when power is restored The Data Log data and configuration are stored separately from EEPROM data The EW and ER commands do not affect the data logger 12 1 Time Commands TM yy yy mm dd hh mm ss yyyy mm dd hh mm ss Time ER Ge Time in seconds TM and TS set or report the setting of the real time clock TM uses an international 24 hour time format TS reports sets time in seconds since 12 00 Midnight on Jan 1 1970 1970 01 01 00 00 00 The TM and TS commands are also used to determine the format of the LD command The range of the TM format is as follows yylyy 19 70 20 69 Year mm 1 12 Month dd 1 31 Day of Month hh 0 23 Hours mm 0 59 Minutes ss 0 59 Seconds 12 2 Log Initialize Delete LI dd dd dd dd dd TM TS D1 D4 5 Initialize Log LI initializes the data logging functions deleting any previously stored data and programs which data items will be stored The data in the log is stored as 4 byte floating point numbers Time must be stored in addition to at least one of the data items D1 D4 The data log has room for 24576 data items Storing only time and D1 for example will allow up to 12288 data points to be stored If D2 D3 and D4 are also recorded the number of samples that can be stored will decrease accordingly After the log is initialized the log rate and start stop time must be set for logging to commence Note The Ll command deletes all points currently stored in th
3. with 8 data bits 1 stop bit and no parity Multiple devices may be connected to the RS422 and RS485 ports in a daisy chain fashion with total cable lengths up to 1 kilometer Any one of these devices may be used as an RS232 to RS422 translator eliminating the need for stand alone translators or special RS422 serial ports Figure 2 and Figure 3 show typical wiring configurations for multiple devices Transducer Transducer Transducer 00000 00000 00000 12V 12V RS422 4 RS422 4 RS422 4 200mA S422 485 200mA S422 485 S422 485 i z NGUT 9G ngogoo NOV eG ps2320 RH s RA TR NT S AL MI 5 o mess A M II Figure 2 Typical Wiring Using an RS232 Host PC Transducer Transducer Transducer 12V 12V RS422 485 RS422 485 RS422 485 200mA BUT 200mA N DT NGUT te p E c um 9G ngogoo RH 9 9 RS232C SES IL 1 Mill IL IW Less II ICH ta ry RS422 485 RS422 485 RS422 485 Figure 3 Typical Wiring Using an RS422 485 Host MAC Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 4 In the operation configuration shown in Figure 2 the first transducer interface is operating as an RS232 to RS422 translator Figure 4 shows in block diagram form how the protocol transl
4. factor and an offset The scale factor defaults to 1 0 and the offset to 0 0 The output is computed based on the following equation where the units of each term is shown in parentheses Dow units scale units CU X Date CU offset units CU is the calibrated unit as specified in the coefficient file See Section 7 4 For Quartzdyne pressure transducers the calibrated units are psi for D1 primary output and C for D2 secondary output It is the user s responsibility to verify that the scale factors are appropriate for the calibration type Note Programming a unit does not select it The Series is initially programmed with the units conversion factors shown below Any of these may be changed by the user Each program can be used with either D1 or D2 Use the EW command Section 10 1 to store the changes permanently Program Name Scale Offset UP1 psi 1 0 0 0 UP2 bar 0 0689476 0 0 UP3 MPa 0 00689476 0 0 UP4 mH20 0 70307 10 335 UP5 C 1 0 0 0 UP6 K 1 0 273 15 UP7 F 1 8 32 UP8 R 1 8 523 67 Example 01UP8 Atm 0 0680272 Atm 0 0680272 0 Units Program 8 to Atmospheres 01UN1 8 5 Atm Select Atm as Pressure units Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 8 7T Calibration Commands 7 1 Span and Zero S 1 2 span range Span Span Adjust Z 1 2 zero Zero Zero Adjust The S and Z commands set the span and zero for two point calibrations S 1 and Z 1 refer to the primary o
5. or other device before addressed device responded Host time out shorter than gatetime GA Multiple devices set to same address AD Too much time between CR and LF Hardware Error Check Status ES Consult Factory Error 18 Sensor Frequency or Timebase Error Check timebase and coefficients TB CAL Note that TB will be automatically changed when coefficients are downloaded with CAL command Check transducer Cable Error 19 Memory Checksum Error EEPROM Data corrupt Check Lithium Battery Ver 1 02 Must download coefficients units etc Battery Low Error Replace Lithium Battery Ver gt 1 02 Software Error Consult Factory
6. D Figure 5 RJ11 Series I and MINI DIN 8 Macintosh Pin Numbers Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 6 4 Serial Communications Protocol Overview Any commercially available terminal emulator can be used to communicate with the Series The program LTALK on the Series program disk is tailored for this Also included on the disk are demonstration programs including source code showing how to interface with the Series See the README TXT file on the program disk for more information In the command documentation square brackets indicate optional parameters a vertical bar indicates alternate parameters Uppercase letters indicate literal expressions lowercase letters indicate data formats and italics represent data values and descriptions The character indicates a CR LF sequence All command lines are preceded by a three character address sequence The first of these is the hash character 4 followed by two numeric digits which are unique to each transducer on the bus The address 00 is an all call or global command all transducers on the bus will interpret the command but none will respond Each device is initially programmed to address 01 If multiple devices are installed the logical addresses must be changed with the AD command Section 9 1 before they are physically connected together Commands may be terminated by a CR LF or both Responses are terminated b
7. QUARTZDYNE OPERATING MANUAL for QUARTZDYNE SERIES TRANSDUCER INTERFACE AND DISPLAY QUARTZDYNE INC A RESOURCES COMPANY 1020 ATHERTON DRIVE SALT LAKE CITY UTAH 84123 3402 USA 801 266 6958 FAX 801 266 7985 www quartzdyne com Quartzdyne reserves the right to change specifications without notice QUARTZDYNE and the Crystal Logo are Registered Trademarks of Quartzdyne Inc JAN 2000 Copyright 2000 by Quartzdyne Inc Printed in U S A Series Transducer Interface and Display Operating Manual Table of Contents 1 10 11 12 13 14 Transd cer elle e e ictu keit ce oc ocn n pad 1 TA Standard Contiguration E 1 125 RE ABEE le EE 1 User Serviceable Parts ea tta retra a dita sa teet tite EES EE 2 2 1 Case Assembly Disassembly nnne nnn 2 2 2 Transducer Supply Voltage Geet 2 2 3 Lithium Battery Hepnlacement nennen nennen nnn 2 Serial Communications Hardware menn nennen nnn nnne 3 C MENO AMI DUE 3 E E d 4 3 3 RS422 aNG RS485 reeetr tere rro a eR de Redi had c ea pera a ce adag 5 Serial Communications Protocol Ovenlew nennen nnn nnns 6 B IER lun E ale EE 6 Hl Read REI EE 6 lui e ul TEE 7 Gals Select CEET 7 6 2 Program UNIS som OP PPPDPEPPPPUER C PEMPMEEDEEPMME 7 Galibrationi Gomtmands EEN 8 FEL 5 Spansand Zero erbe ac Ra PM PM Te VEDI 8 Ke FUL CANDTAt ON WER 9 7 3 Reference Based Coefficients ccccccccccccccceseeceecseeeceeeeeeeeeeeeecee
8. ammed start and stop times are reported See example in Section 12 6 12 5 Log Length LLA nnnnnaA Log Length Reports the number of data sets currently stored in the log 12 6 Log Dump LD n1 n2 time nnnn nn nn Jn Dump Log time nnnn nn nn Jn h Dumps data from the log in the format specified above When more than one line of data is returned braces will enclose the response Time will be reported in the most recently used format LI TM or TS All other items will be dumped in the currently programmed units and with currently programmed scale and offset Units may be changed during the data logging If only n1 is specified a single data set will be dumped If both n1 and n2 are specified data sets ranging from n1 through n2 will be dumped n1 can range from 1 to the number returned by LL n2 can range from n2 to the number returned by LL If neither n1 nor n2 are specified the entire data log will be dumped Display updates and data logging functions will be suspended during log dumps The following example programs the data log to store Time D1 and D2 if D1 changes by at least 1 0 but no more than once every 10 seconds Data logging is started immediately and continues until 7 00 a m on Christmas morning or until the log memory is full Commands and responses are on alternating lines Comments are in italics 01LI TM D1 D2 Initialize Logging for time D1 and D2 TM D1 D2 01LR 10 AND D1 1 0 Set Logging Rate and C
9. ation is done Multiple transducers are connected in parallel on the RS422 ports If a signal is detected on the RS232 receive port it is echoed to the RS422 receive port where it is heard by all of the units Any signal which is detected on the RS422 transmit line is also echoed to the RS232 transmit port so that an RS232 Host can detect it The transducer interface always listens to both of its RS422 ports and replies on the RS422 transmit port In an RS485 implementation the host must be able to disable its line driver during a reply sequence In this case only the transmit lines are used Transducer Interface RS422 Host b Lx dj s RS232 Host DR lt f d Figure 4 Translation of RS232 and RS422 485 signals 3 2 RS232 The RS232 port on the Series is directly compatible with the standard IBM AT style 9 pin serial port Table 2 shows the function of each of the pins Note that the labeling of the RX and TX pins is relative to the device in question thus RX on the host is connected to TX on the Series The RS232 Cable supplied by Quartzdyne is a standard straight through DB 9P to DB 9P cable Beware of commercially available RS232 null modem cables where several of the pins are swapped Hardware handshaking is not required by the protocol but since most AT type computers require DTR and CTS to be active these lines are supported The DSR and CTS han
10. dshake lines are driven high ACTIVE when the transducer interface is ready for data Communications are half duplex only one device may talk at a time For convenience power 9 15 VDC may be supplied to the transducer interface via pin 9 RI of the RS232 port Some serial port interfaces provide external power on this pin Table 2 RS232 Pin Numbers and Functions 4 Data Terminal Ready DTR N A NA 0 0 0 0 0 0 0 0 y 5 SignlGrun SignlGrund 6 DataSetReady DSH DSR 7 RequsttoSend RTS NA 8 GlartoSend CTS CTS o y O 9 Ring Indicator R Auxiliary Power These lines required for communication Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 5 3 3 RS422 and RS485 RS422 and RS485 use differential drivers and receivers to enhance noise immunity and increase transmission distance RS422 uses two wires for transmitting TX and two more for receiving data RX RS485 uses only two wires TX The transducer interface output driver is only enabled during transmission of data allowing multiple devices to be connected on the same wires A maximum of 31 devices including the host may be connected in the RS422 RS485 system Line terminations are recommended in the RS422 and RS485 standards but are not required with the Series because of the relatively low baud rates If data errors occur with long transmission lines a term
11. e beginning of each reply To eliminate this error message issue an EM20 command This will suppress the reporting of the low battery condition but will not change the status reported by the ES command The battery should be replaced as soon as possible since the device configuration and data logging features are dependent on it Before replacing the battery make sure you have copies of coefficient files and other relevant settings units span zero so that these can be restored after the battery is replaced See ROMREAD EXE and ROMWRITE EXE on the software disk for a convenient way to retrieve and upload Series ROM data The battery is located on the CPU board as shown in Figure 1 To remove the battery insert a screwdriver or coin in the slot on the battery holder and gently pry the battery up until it can be slid out if its socket Insert the new battery with the sign on the top Use only Panasonic type BR2330 or equivalent batteries CEO pes des 5V Battery Clip BUFFER BOARD Rom Socket Pin 1 71 Figure 1 User Serviceable Parts Locations Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 3 3 Serial Communications Hardware 3 1 Overview The interface can communicate with standard RS232 RS422 or RS485 ports available on most computers Communication may occur at baud rates ranging from 1200 to 9600 baud
12. e log Power must be on for data to be logged The log settings and logged data are preserved during power down See example in Section 12 6 12 3 Log Rate LR 2nsec AND OR Dn step nsec AND OR Dn step Logging rate Data is stored at time intervals specified in seconds Optionally a condition may be included based on one of the logged data items In the AND mode data will be logged at the time interval only if the data Dn has changed by at least the value of step In the OR mode data will be logged at the time interval OR if the data has changed by at least step since it was last logged If the number of seconds is set to zero all data points will be logged as they become available at the gatetime rate The logging rate may be changed while data is being logged See example in Section 12 6 Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 16 12 4 Log Start Stop LS START siart stop STOP stari stop STOPPED Start Stop times Data logging will commence when the time programmed by start is reached and continue until the time specified in stop If no stop time is specified logging will continue until the log is full To start stop data logging immediately use the words START or STOP instead of the actual times The times will be reported as in TM or TS depending on the last format used Logging may be stopped and started at will without destroying previously logged data Only the most recently progr
13. e the case first verify that all ribbon cable connectors are fully seated in their correct positions Slide the bottom board into the bottom slot and position the extensions from the upper board into the first slot above the center screw holes Rest the device on the display and tighten the screws in a plus ex pattern so as not to damage the EMI gasketing first install all screws loosely then tighten the screws on the center of each side before tightening the screws in the corners 2 2 Transducer Supply Voltage Select The Series can supply the transducer with either unregulated 9 15 VDC prior to December 1999 or regulated 5 VDC Standard beginning December 1999 This is selected via a jumper block on the transducer input buffer board which is the smaller of the two boards mounted to the back panel Position the shorting bar so as to short the center pin to the appropriate supply voltage as shown in Figure 1 Series s that have been set at the factory to supply 5 Volts will have a 5V sticker affixed to the back panel to indicate the selection 2 3 Lithium Battery Replacement The Lithium battery in the Series is designed to last for approximately one year Actual lifetime will vary from device to device and depending on operating conditions such as temperature humidity and usage patterns During the boot sequence the battery voltage is checked and if the voltage is shown to be low an ERROR 20 is reported on the display and at th
14. eaeneeeeeaeeeeeanes 10 7 4 Calibration el Ve 10 7 5 Transducer Inf rmalo N egetesegussuseguguugegsegieuegegebugegagebug tera concu eae vk ce QE 10 Frequency Counter Commandes 11 El uter ee 11 89 2 Galetlmies sis eieineanu necmaecunsc nne nai a POI n TIN TED 11 RCRUM Et 11 Communications Protocol Commande nnne nennt na nane nnns 12 9 1 Device ele le 12 9 2 Baud Bale dei Discere D uv DG ee 12 Miscellaneous Commande 13 10 1 EEPROM Read We eene nen nnne nnn nns 13 10 2 Software VerSIOn reni rici ra Decet ren nd a e ea ndn Rr n 13 10 3 Display Mode ji 1 rr ER SERERE eel nese aster 13 Error GCommMmaANd EE 14 Tisk Eror Message 4 t a a Sa 14 11 2 Hardware Status Commande 14 Data Logg iiti iz Gioacchino 15 CS We bi Ae eil El E 15 12 2 Log Initialize Delete nennen nnne nnne 15 12 9 l OgiHale erre Mo Fc cen P Mc 15 EE De RE ue ME 16 12 5 Log Eeng 32 eene Ee 16 12 M rere DIUI oT TEORIA 16 Command SUMMANY aecenas pe pln se n eR a dicen Rd eda ea 17 Error Messag6S dii Leine nona EOE IMPRIMIR E EREPERX4Y 18 Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 1 1 Transducer Connection 1 1 Standard Configuration The transducer interface is directly compatible with most Quartzdyne transducers A female DB9 connector located in the center of the back panel is standard The table below shows the pinout which is consistent with Series QS and QU cables The frequency input signals are desig
15. ecause it was the last error reported Once an error has been suppressed in this fashion it will not be reported until the condition corrects itself and then fails again or the power is cycled off then on The ES command will continue to report the suppressed error condition as long as it persists 11 2 Hardware Status Command ES status Hardware Status The status of certain hardware conditions can be read If this value is non zero an error state exists The hardware status flags are bit mapped into a 16 bit integer The bit fields are shown in Table 4 Conditions other than those shown indicate hardware failure and should be recorded and reported to Quartzdyne Table 4 Hardware Error Status Bits Bit Value Meaning Cd o 1 No Pressure Frequency Signal 2 No Temperature Frequency Signal 2 4 No Reference Frequency Signal KEE SLICE ee 4 1 16 EEPROM Checksum Emer 5 1 1 32 BackpBatteryLw li dc o e y o GE e E EEN Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 15 12 Data Logging The Series Transducer Interface is supplied with 98K of battery backed memory and a real time clock for data logging This allows logging of up to 12288 data points The data logger requires the power to be on for data to be logged Configuration and data are retained when power is removed If power is removed during an active logging session
16. er output frequencies the coefficients provide digital temperature compensation of the reference frequency The computed output is a function of the ratio of the sensor and reference frequencies This ratio does not depend on any external reference making the transducer a true self contained transfer standard Note that the displayed frequency D3 or D4 does not reflect the digital compensation The true frequency can be computed by the following equation F reference 7 2e6 Factual F isplay x Freference May vary from 7 200 MHz by several kHz depending on the transducer and operating temperature see the Series QR Specification Sheet Consequently Pac and Faispiay may differ by 0 1 or by as much as 64 Hz at 64 kHz Faispia should be used when computing coefficients during recalibration The transducer interface automatically selects the Series Te optional TCXO when standard coefficient files are downloaded to the transducer interface The transducer s reference frequency is automatically selected when reference based coefficients are downloaded See the TB command Section 8 1 for more information on selecting the TCXO 7 4 Calibration Information CD 1 2 dd mmm yyyy Calibration Date CU 1 2 5 units Calibrated Units CR 1 2 Pmax Pmin Smax Smin Calibration Range CT 1 2 Pressure Temperature Other Calibration Type The CD CU CR and CT commands return specific information from the programmed calibration files CR will
17. file contents are sent with surrounding braces Extra carriage returns and line feeds are ignored CAL 1 will set the primary coefficients which are used to calculate D1 typically Pressure CRF or CRT files CAL2 will set the secondary coefficients which are used to calculate D2 typically Temperature CRT or CFT files Send an EW command Section 10 1 after programming coefficients to make the changes permanent In the example the full command is sent before any response is received Be sure to use the correct coefficient file as described in Section 7 3 An R in the serial number line indicates Reference based coefficients CAL will automatically select the transducer reference frequency FR as the timebase Section 8 1 if there is an R in serial number Otherwise the internal timebase TCXO will be selected If the selected timebase is not available an Error 18 will occur COMMAND RESPONSE MEANING 201CAL2 A Secondary Calibration 023995R 023995R Serial Number R for ref TemperatureA TemperatureA Type DC DC Units 34 34 Fit order in F2 14 14 F2 prescale algorithm 0 014 0 014 F2 prescale factor 500612 50061 F2 prescale offset 04 04 Fit order in F1 14 14 F1 prescale algorithm 0 014 0 014 F1 prescale factor 20161 20161 F1 prescale offset 19 7130934982 19 7130934982 Cf 0 0 872692993263 0 872692993263 Cf 1 0 00161158992916 0 00161158992916 Cf 2 3 41566295992E 06 3 41566295992E 06 Cf 3
18. ination pod may be placed in the empty RS422 485 jack at each end of a string of devices The termination is a 110 Q resistor in series with a 0 01 uF capacitor between the leads of each RS422 wire pair Two RJ11 jacks are located on the bottom of the rear panel The pinout of each is the same and is shown in the table below Signaling is non inverted during idle periods the input should be high and the input should be low A start bit is the reverse of this the input should be low and the input should be high The RS422 cables supplied by Quartzdyne are straight through with pins 2 thru 5 connected Pins 1 and 6 may be used for an optional shield but shielded cables are neither required for communications nor supplied by Quartzdyne The RJ11 jack used in the Series is the same jack used commonly in phone systems in the United States The standard phone cable is not straight thru however each of the pins are reversed 2 to 5 and 3 to 4 resulting in a polarity reversal of the transmit and receive lines Table 3 shows the pin numbers and function for the RJ11 connectors as well as the pin numbers of the MINI DIN 8 Apple Macintosh serial port Note the difference in naming convention between the Macintosh RS422 port and the Series See Figure 5 for pin number locations Table 3 RS422 Pin Numbers and Functions RJ11 RS422 Function RS485 Function Translate Function MINI DIN 8 Pin Number Mac Pin Number RX TX to RS232 TX
19. is selected and a TCXO is not present or if FR is selected when FR is not present a frequency error will occur Error 18 When coefficients are downloaded using the CAL command FR or TCXO is automatically selected based on the transducer serial number as listed in the first line of the coefficient file An R at the end of the first line indicates that it is a reference based coefficient file so FR is selected Otherwise TCXO is selected The TB command can be used to override this default condition after the coefficients have been downloaded See Section 7 3 for a discussion of which time base option is appropriate 8 2 Gatetime GA gatetime n nna Gatetime in seconds The gatetime command ROM Rev 2 01 and greater allows variable gatetimes for the counters ranging from 0 13 seconds to 9 99 seconds Communications protocols and internal processing capabilities may limit throughput at faster gatetimes to 0 20 seconds The frequency counter resolution and therefore the calculated output resolution will be affected by the gatetime Shorter gatetimes will yield proportionately less resolution than longer gatetimes Both displayed and transmitted data resolution will be adjusted automatically based on the gatetime When a gatetime command is received the gatetime will be displayed momentarily on the display A 1 00 second gatetime would be displayed as G 1 00 8 3 Trigger TRA TRA Trigger Counters The trigger command synchronizes the frequency co
20. l NE EE T E E a SU 8 Freqeny2 ons i5Vpp 79 7 No Canine tion aua 1 2 TCXO Option The TCXO option is available for use with transducers such as the Series QD that do not have a reference frequency output The output of the TCXO is available on pin 4 of the Series l s transducer connector This output can be used to verify the actual frequency of the TCXO for calibration purposes Because the TCXO output is not buffered it should not be used to drive long cables or multiple transducer interfaces If the TCXO option is not installed pin 4 can be used as an input for an external 10 MHz timebase The input amplitude should be HCMOS compatible 5 Vpp The TCXO provides no advantage over using the transducer reference frequency if the reference frequency is available See Sections 7 3 and 8 1 for more information on using the TCXO option Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 2 2 User Serviceable Parts Warning The Series Transducer Interface contains static sensitive devices Use static prevention measures when accessing the inside of the case Work only in an ESD safe work area 2 1 Case Assembly Disassembly To open the case remove the eight Phillips head screws from the perimeter of the back case Carefully slide the back panel and electronics assembly out of the front portion of the case Avoid damaging the EMI gasketing materials on the back panel To re assembl
21. n default The ER command restores the transducer interface to its power on state In each case the status of the hardware flags is returned see Section 11 2 The user should record all of the transducer interface variables i e units programs coefficient files display mode in case the EEPROM checksum fails If an EEPROM checksum error occurs all variables will be set to safe factory presets AD 01 Coefficients Invalid etc To restore the EEPROM contents first clear the error by re writing the EEPROM Then restore the variable contents and execute another EW command The programs ROMREAD EXE and ROMLOAD EXE are useful for archiving and restoring the EEPROM contents If other devices are on the interface it may be necessary to disconnect them until the address is restored 01EW Error 19 0 Clear Error State 01CAL1 cffile cffile Download Coefficient File 01CAL2 01EW 05 Save settings in EEPROM 10 2 Software Version VERA revision message Software Revision The VER command reports the software version of the transducer interface ROM It is the default command on power up The ROM revision is reported on the display in response to this command and during the startup sequence as the first three digits of the initial screen 2 01 01 01VER Ver 2 01 05 02 96 c 1996 Quartzdyne Inc 10 3 Display Mode DM 1 2 3 4 5 6 7 5 1 2 3 4 5 6 7 Display Mode Sets the LCD display mode Modes 1 through 4 display the correspo
22. nding data item D1 to D4 Mode 5 alternately displays D1 and D2 Mode 6 displays the two frequencies D3 and D4 Mode 7 displays all of the data D1 D2 D3 and D4 in sequence The display is updated once each gatetime except for long gatetimes where the entire sequence is repeated each gatetime If a calibration coefficient file is not valid for D1 or D2 the corresponding display will be bypassed in the rotation In any of the alternating modes the display flashes momentarily before displaying the first data item of the sequence Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 14 11 Error Commands 11 1 Error Message EM nn message Error Message If a command is not recognized data is out of range or the transducer is not operating properly the text ERROR n will be sent instead of the normal response to a command The display will also show an error indicator such as E 11 To receive a full message rather than a number issue the EM n command where n is the number of the message you want to receive If n is omitted the message corresponding to the most recent error will be sent The error messages and likely causes and remedies are listed in Section 14 Some error states are persistent causing them to be reported at the beginning of each reply These error messages may be suppressed by issuing an EM n command where n is either explicitly set to the persistent error message number or defaults to it b
23. ned to withstand reasonable static discharges However care should be taken to prevent excessive voltages on these lines Properly discharge potential static sources before connecting The input sensitivity allows detection of frequencies in the ranges shown in the table with amplitudes as low as 1 Vpp Power is supplied to Quartzdyne transducers on pin 6 BV 5 or 9 15 VDC unregulated The maximum load on this line should be less than 50 mA The supply is protected with a 200 mA solid state fuse The ground and shield leads are referenced to the power supply pin and to the interface chassis Prior to December 1999 the default output voltage was set to 9 15VDC Beginning December 1999 the default output is set to the regulated 5 VDC and a 5V sticker is affixed to the back panel See Section 2 2 for details on setting the output voltage option Warning Series QL and LV transducers may be damaged if supplied with more than 5 5 Volts Verify that the Series has been set to 5 Volts prior to connecting any transducer that is specified for 5 Volt use only Warning In order to comply with radiated emissions standards the transducer cable must be fully shielded with 360 termination Failure to provide adequate shielding is likely to result in emissions which will exceed national and international RF standards Table 1 Transducer Connection Pinout p round te ER e fea ee 6 Supply Output VDC 5 0 100 mA 9 15 VDC optiona
24. onditions 10 AND D1 1 0 01LS START 1992 12 25 07 00 00 Start logging and set stop time 1992 12 24 16 59 59 1992 12 25 05 00 00 Start and Stop times confirmed 01LL Some time later log length is checked 154 01LD 11 155 Read last 5 log entries 1992 12 24 23 59 45 1012 21 1 5125 1992 12 24 23 59 55 1018 32 1 5135 1992 12 25 00 00 10 1017 31 1 5145 1992 12 25 00 05 23 1016 31 1 5155 1992 12 25 00 05 38 1013 15 1 5165 l4 Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 17 13 Command Summary D 1 D2 D34 D4 UN 1 n name UN2 n name UP 1 name scale offsef UPn name scale offset S 1 2 span range Z 1 2 2zero CAL 1 2 file contents CD 1 2 5 CU 1 2 5 CR 1 2 5 CT 1 2 M 1 2 5 ID 1 2 TB FR TCXO freq GA gatetime TRA DM 1 2 3 4 5 6 7 VERA AD adaress BR baud EM nn 5 ES ER EW TM yy yy mm dd hh mm ss TS 2ts LI dd dd dd dd dd LR 2nsec AND OR Dn step LS START starT stop STOP LLA LD n1 n2 nnnnn nnn nnnnn nnn nnnnnn nnn nnnnnn nnn namen namen name scale offset name scale offset span zero cffile contents dd mmm yyyyaA units Pmax Pmin Smax SminA Pressure Temperature Other nnnnn nnnna nnnnnnnna FRITCXO freq n nnaA TH 1 2 3 4 5 6 7 revision message nna nnnnA message status status status yyyy mm dd hh mm s
25. return the primary range Pmax and Pmin in the current units for D1 and the secondary range Smax and Smin in the current units for D2 The calibration type returned by CT is the name of the parameter being measured as specified in the coefficient file CU returns the calibrated units from which the user programmable units are calculated For Quartzdyne pressure transducers the calibration types are Pressure and Temperature standard units are psi and C 7 5 Transducer Information M 1 2 nnnnn nnnna Model Number ID 1 2 nnnnnnnnA Serial Number The M and ID commands return the model and serial number as downloaded in the coefficient file Note that an R at the end of the serial number indicates to the Series that the coefficients are reference based See the TB command Section 8 1 for more information on selecting the TCXO Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 11 8 Frequency Counter Commands 8 1 Timebase TB FR TCXO freq FR TCXO freq Select Timebase The timebase command is used to select either the transducer reference frequency FR pin 5 or a TCXO pin 4 or internal The default frequencies for these are 7 2 MHz and 10 0 MHz respectively The actual value used in frequency calculations may be set with the freq parameter of this command to allow for calibration of a TCXO or for non standard reference configurations A separate frequency value is stored for FR and TCXO If TCXO
26. rned is automatically adjusted to what is justifiable based upon the gate time units and calibration coefficients It may be useful to combine multiple data statements in the same command line so that one request for data will return all of the data needed The data commands can be used in the global mode to set up a command format as illustrated below Command Response Comments 00D3 D4 global command for F1 and F2 015 12234 55 45000 12 01 s response 025 23456 78 33453 125 02 s response Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 7 6 Units Commands 6 1 Select Units UN 1 n name name Primary Units Pressure UN2 n name name Secondary Units Temperature UN selects the units to be used from the programmed units table The units may be selected by name or number The name of the currently programmed units is returned The name search is not case sensitive If the number is out of range 1 8 or the name cannot be found an error is returned 01UN1 BAR barn Pressure Units to bar 01UN2 C Cr Temperature Units to C 6 2 Program Units UP 1 name scale offset name scale offsets Units Program 1 UPn name scale offsef name scale offsets Units Programs 2 8 The UPn command is used to program each of the eight available units programs If n is not specified 1 is assumed The units program includes a name by which the units are referred maximum 5 characters a scale
27. sA nnnnnnnnnna TM TS D1 D4 5 nsec AND OR Dn step stari stop STOPPED nnnnn time nnnn nn nn Jn time nnnn nn nn Ja js Pressure Temperature Frequency 1 Frequency 2 Pressure Units Temperature Units Unit Program 1 Unit Program 2 8 Span Adjust Zero Adjust Full Calibration Calibration Date Calibrated Units Calibration Range Calibration Type Model Number Serial Number Select Trim Timebase Gatetime Trigger Counters Display Mode Software Revision Response Address Baud Rate Error Message Hardware Status Read EEPROM Write EEPROM Time Time in seconds Initialize Log Logging rate Start Stop times Log Length Dump Log Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 18 14 Error Messages Error Descripion Possible Causes Relevant Commands Erro No Emo o ne ee Missing characters in host serial software String data contains too many characters Use UPn to program units into the units table Error 6 Numeric Overflow Inappropriate Coefficients CAL Inappropriate Units UN UP Inappropriate Span or Zero adjust S Z Input frequency out of range Serial Port Parity Error Error 11 Serial Port Framing Error Incorrect Baud Rate BR Polarity Reversal on RS422 lines ESD Event Break Character Sent Log Hardware Not Installed Use Ll before LL LR LS Error 16 Protocol Overrun Characters sent by host
28. store new address 9 2 Baud Rate BR baud baud Set Baud Rate The baud rate command ROM Ver 2 01 and greater allows communications at baud rates ranging from 1200 to 9600 This feature was added to accommodate the higher throughput needs of systems using faster gatetimes and systems with several transducer interfaces on a single port The command will reply at the old baud rate to allow verification that the baud rate has been changed It is recommended that an EW command be issued at the new baud rate after setting this command The baud rate will be displayed momentarily upon receipt of this command in the format 1200 The baud rate is also displayed during the startup sequence right after the ROM version and address are displayed The demo programs accompanying the Series have been updated to allow communications at standard baud rates within this range 01BR 12002 Communicating at 1200 Baud 01BR 9600 9600 Set 9600 Baud reply still at 1200 Change Baud rate of host to 9600 01EW On Store new baud rate at 9600 Baud Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 13 10 Miscellaneous Commands 10 4 EEPROM Read Write ERA status Read EEPROM EW status Write EEPROM All of the programmable variables are stored in battery backed memory On power up defaults are obtained from this memory and subsequently can be changed by the user The EW command saves the current settings as the power o
29. unter gate with the software command The command is most useful when several transducers are monitoring a process which is changing rapidly In this case the command should be sent in the global mode All transducer interfaces will delay the next gate closing for a period of one gate time after the trigger command is received Synchronized data will be available after the gate closes and calculations are completed Once synchronized the transducers should remain synchronized for several minutes or until an LD or CAL command is received Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 12 9 Communications Protocol Commands 9 1 Device Address AD nn nna Device address The address command sets the transducer interface response address The response will be the new address The address of a device is shown on the front panel in response to this command and during the startup sequence as the last two digits of the initial screen 2 01 01 The response address digits are limited to numbers between 01 and 99 allowing for up to 99 logical interfaces on the same serial port Initially the response address is set to 01 Before connecting multiple devices together the addresses must be reprogrammed The following example assigns the address 02 to a device The example assumes that only one device is connected and that its address is unknown 00AD 02 Global command 02AD 024 Verify new address 202bEW 04 Permanently
30. utput pressure S2 and Z2 refer to the secondary output temperature Zero and span are input in the current units They are adjusted automatically when units are changed The span adjustment is the desired change at full scale If a value other than full scale is used to calculate the span adjustment include that value in the range argument The following equation is used to calculate the interface output Span Dou T el x Deatc zero ma In a typical two point calibration the span and zero are initially set to zero Data is taken at the zero point and zero is calculated as zero Dactuat Dmeasurea Enter the zero using the Z command 01Z1 zero zeron Next data is taken at a known point near full scale Span is calculated as span Dacua Dmeasured Enter the span adjustment using the S command 01S1 span Dmeasured n Span The returned span will have been adjusted for the calibrated full scale load Use the EW command Section 10 1 to store the changes permanently 01EW del Note Two point calibration trimming is not generally recommended for Quartzdyne Transducers Series Transducer Interface and Display Operating Manual ROM V2 04 Jan 2000 Page 9 7 2 Full Calibration CAL 1 2 file contents file contents Full Calibration CAL accepts and echoes coefficient files in the format provided by Quartzdyne The format of these files is described in the transducer user s manual and documentation disk The
31. y a CR LF sequence The null command nn can be used to repeat the previous command The equal sign is used to program a value Data items within a command or response are separated by commas Multiple commands may be sent in a single command line with each command separated by a semicolon The responses will be comma separated see example Braces are used to enclose commands that include CR LF sequences such as the contents of a calibration file or multiple line data log dumps Tab and space characters are generally ignored Invalid commands or data respond with ERROR nn where nn indicates the particular error A typical command response sequence is shown 01D1 D2 4522 45 120 245 017 4522 47 120 225 A copy of all programmable data is stored in nonvolatile memory EEPROM On power up defaults are assigned based on the contents of this memory The contents of this memory are accessed using EEPROM commands See Section 10 1 5 Data Commands 5 1 Read Data D 1 tnnnnn nnn Primary Output Pressure D22 tnnnnn nnn Secondary Output Temperature D3 nnnnnn nnn Frequency 1 D44 nnnnnn nnn Frequency 2 Data commands are used to read the transducer interface lf data is available the response will be immediate If the current data has already been read the response will be delayed by up to 1 gate time If data is not available for any other reason an appropriate error indicator will be sent The precision retu
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