Quartzdyne Q-Link
Contents
1. QLinkManual200809 doc nnnnn nann nnnnn nnn nnnnnannnn nnnannannnn namen7 namen name scale offset span zeron Ecffile contents dd mmm yyyy default units alternate units Pmax Pmin S max Smin Pressure Temperature Other nnnnn nnnn nnnannnnn channel status channel status 0 01 up to 24 TR gt nnannnnnn revision message nna nnnn message 7 status status status yyyy mm dd hh mm ss TM TS D1 D4 nsec ANDI OR Dn step start stop STOPPED nnnnn Primary Data Pressure Secondary Data Temperature Frequency Ratio 1 Frequency Ratio 2 Primary Units Pressure Secondary Units Temperature Unit Program 1 8 Span Adjust Zero Adjust Full Calibration Calibration Date Calibrated Units Calibration Range Calibration Type Model Number Serial Number Get Coefficients Write Coefficients Gatetime in Seconds Trigger Counters FPGA Revision Software Revision Response Address Baud Rate Reset Error Message Hardware Status Read Configuration from Flash Write Configuration to Flash Time Time in seconds Initialize Log Logging rate Start Stop times Log Length Dump Log Q 6 uartzdyne Q Link Operating Manual September 2008 ERROR MESSAGES Page 1 8 Possible Causes Relevant Commands Erroro No Error Bad Coefficients Download using CAL1 file contents AAA Unrecognized Command Error 4 Invalid Data Numeric Overflow2. integers equal to 2 32 times the sensor frequencies divided by the reference frequency These numbers are used as the inputs to the polynomials defined by the coefficient files 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 13054114 32541297 01 s response 025 12463731 31031324 02 s response 4 2 2 Select Units UN 1 n name namen 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 psi psiz Pressure Units to psi H01UN1 Bar Bara Pressure Units to bar 01UN2 C Cu Temperature Units to C 01UN2 F Fa Temperature Units to F 4 2 3 Program Units UP 1 name scale offset name scale offsets Units Program 1 UPn name scalel 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
3. 5 2 Full Gali fatiOn ias A A ES 13 4 5 3 Getand Write COSMICIONIS iii aida et dd dla lidades 14 4 5 4 CAlMDEMMO NANO MAIN AA td A dd aa aa Adi ib 14 4 5 5 Transducer INfOrmation cccccccceeseseseeeseseceeeeeeeeeeeeeeseseeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 14 4 6 Communications Protocol COMMANAS cccccccccccncnnnnccnncnnnonononononononononononononononononononnonononononononinan 14 4 6 1 DEVICE AGOIESS REEE d cunts lin EAA tes aaron DA TACA EAT ei Tey Ii dame 14 4 6 2 Baud RO is EA AAA AS R EIA A A AE aul wed 15 4 6 3 A A ANO 15 4 6 4 FlIMWare Verla Ass 15 AL Hard Ware GOMMANGS adicta dad ada A A 15 4 7 1 EEPROM Flash Read Write renine e a ei E e e E ie iA 15 4 7 2 Hardware Status COMMANA cccecececscececeeceeeceeeeeeeeeeeeseaeeeeseeesssesseceeeseceeesseesseeeeseseseeess 16 4 7 3 Error MessagO cion A e NANN A 16 48 In application Programming Feature oooooccccnnnoccccnonoccccnnnnannnn nano nnnn nano nn nn nnnn nn nr ran nn r rana 16 5 COMMAND SUMMARY iiccisscicvcctececceacscscccsacdecsedslececccasuedcedsaedacsedevedeatsssduuceaeaedeasodcavenetdue dc dd 17 6 ERROR MESSAGES aia a 18 QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 3 1 INTRODUCTION The QUARTZDYNE Q Link interface incorporates a microprocessor to compute pressure and temperature for up to four digital transducers Multiple Q Links can be connected to the same RS 232 bus Flash memory is integra
4. Error 7 Command Too Long N A Semicolon instead of comma Missing characters in host serial software Numeric data out of range String data contains too many characters Inappropriate Coefficients CA Transducer readings out of range Try shorter commands Error 5 Named Units Not Found UN 1 2 name name not found in units table Use UPn to program units into the units table Response Too Long Serial Port Overrun Error Serial Port Parity Error Serial Port Framing Error Protocol Overrun Hardware Error Number ES QLinkManual200809 doc Try shorter commands slower baud rate BR N A Incorrect Baud Rate BR Polarity Reversal ESD Event Break Character Sent Timekeeper Chip not responding TM TS LI No log settings try setting log N A N A Characters sent by host 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 See Table 4 See Table 4 EEPROM Data corrupt See Table 4 Replace Battery See Table 4 BR
5. are referred maximum 5 characters a scale 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 are shown in parentheses Dow units scale units CU x Deac CU offset units CU is the calibrated unit as specified in the coefficient file See Section 4 5 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 Q Link 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 4 7 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 mH gt 20 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 QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 10 Example 01UP8 Atm 0 0680272 Atm 0 0680272 0 Units Program 8 to Atmospheres 01UN1 8 Atm Select Atm as Pressure units 4 3 Data Logging Commands The QUARTZDYNE Q Link Interface is supplied with 1MB of flash memory most of which is available for data logging It also has a battery backed timek
6. 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 HO1Ll TM D1 D2 Initialize Logging for time D1 and D2 TM D1 D2 There may be a delay before this response 01LR 10 AND D1 1 0 Set Logging Rate and Conditions 10 AND D1 1 01LS START 2003 12 25 07 00 00 Start logging and set stop time 2003 12 24 16 59 59 2003 12 25 05 00 00 Start and Stop times confirmed 01LL Some time later log length is checked 154 01LD 11 15 Read last 5 log entries a 2003 12 24 23 59 45 1012 21 1 5125 2003 12 24 23 59 55 1018 32 1 5135 2003 12 25 00 00 10 1017 31 1 5145 2003 12 25 00 05 23 1016 31 1 5157 2003 12 25 00 05 33 1013 15 1 5165 h 4 4 Frequency Counter Commands 4 4 1 Gatetime GA gatetime nna Gatetime in seconds The gatetime command allows variable gatetimes for the counters ranging from 0 01 to 2 seconds Communications protocols and internal processing capabilities may limit throughput at faster gatetimes 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 4 4 2 Trigger TR gt TR Trigger Counters The trigger command synchronizes the frequency counter gate with the software command The command is most useful when s
7. 0 3 0 250 400 QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 7 3 4 Battery Replacement Warning The Q Link Digital 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 To open the case remove the four screws from the front end of the enclosure Carefully slide the front panel and plastic trim from the enclosure exposing the electronics as shown in Figure 2 Insert a flat head screwdriver 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 Slide front panel and electronics into enclosure using the bottom PCB groove and insert and tighten the four screws ddd e Figure 2 Battery Replacement QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 8 4 COMMUNICATIONS PROTOCOL Any commercially available terminal emulator can be used to communicate with the Q Link The program LTalk exe available from Quartzdyne is specifically tailored for this use The Windows program QConsole exe also available from Quartzdyne implements all of the commands listed below with a simple windows interface 4 1 Command Structure In the command documentation square brackets indicate optional paramete
8. 3 c 1996 Quartzdyne Q Link Version Inc VES 0D020201 Device FPGA Version 4 7 Hardware Commands 4 7 1 EEPROM Flash Read Write ER status Read Non Volatile Memory EW status Write Non Volatile Memory Certain key Q Link parameters are stored in non volatile Flash memory so that they persist even after power down These parameters and their related commands include Gatetime GA Device Address AD Baud Rate BR Units UN and UP and Span and Zero S and Z The ER command copies all of these parameters from Flash to RAM The ER command is invoked automatically on power up The EW command copies all of these parameters from RAM to Flash making them permanent In order to avoid permanently changing a parameter that you didn t intend to we recommend that you use the following procedure to change only one parameter at a time First call ER to get Q Link into a known state Then change the one parameter Finally call EW to make that change permanent Both the ER and the EW commands return the status of the hardware flags This is the same status given by the ES command see Section 4 7 2 01EW 19 0 Clear Error State mg 01 CA cffile cffileya Download Coefficient File 01EW 05 Save settings in non volatile memory QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 16 4 7 2 Hardware Status Command ES status Hardware Status The status of certain hardware conditions can be read If this value i
9. 4 byte floating point numbers Time is always stored in addition to at least one of the data items D1 D4 The table below shows how many points can be stored depending on how many data items are stored Note that there are four independent channels A D which share this memory space so if you log data on more than one channel the number of points per channel is reduced accordingly Within the data logging memory are fourteen sectors Each of these sectors is allocated to one of the four channels on a first come first served basis A sector cannot be shared by more than one channel This means that one channel might report that its log is full Error 14 while other channels still have room for more data points Use the 00LI command to erase logged data for all channels ensuring that the maximum amount of space is available for subsequent data logging After the log is initialized the log rate and start stop time must be set for logging to commence Power must be on for data to be logged The log settings and logged data are preserved during power down See example in Section 4 3 7 QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 11 Number of Example Command Points per Sector Points per Full Log Data Items 14 Sectors 1 01TM D1 8192 114688 2 01TM D1 D2 5461 76454 3 01TM D1 D3 D4 4096 57344 41401TM D1 D2 D3 D4 3276 45864 4 3 3 Log Rate LR nsec AND OR Dn step nse
10. 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 Ll 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 A single data set is transmitted if only n1 is specified The range of data sets from n1 to n2 is transmitted if both n1 and n2 are specified n1 can range from 1 to the number returned by LL n2 can range from n1 to the number returned by LL If neither n1 nor n2 are specified the entire data log will be dumped Data logging will be suspended during log dumps Please note that serial communications handshaking is not supported by the Log Dump function This means that there is a chance that characters will be lost if the receiving program cannot keep up with the character stream being sent by the Q Link If you find that some lines of data are missing characters try dumping at a slower baud rate or try dumping the log in smaller pieces Also the only way to abort a log dump is to cycle the power on the Q Link QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 12 4 3 7 Data Logging Example The following example demonstrates how to program the data log to store Time D1 and D2 In this example data will be stored if D1 changes by at least 1 0 but no more than
11. OPERATING MANUAL for QUARTZDYNE Q Link QUARTZDYNE INC a LOD 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 the Crystal Logo and DOVER are Registered Trademarks of Dover Corporation and Affiliates September 2008 Copyright 2003 5 by Quartzdyne Inc QLinkManual200809 doc Quartzdyne Q Link Operating Manual Table of Contents 1 INTRODUCTION bisicsscsscsdscadeainivadiasteuca sdcasecadssovesaddsaiscadasavseddadndscadsdbesvadsdnassadadeusanadsdeceveidsnadvascenvuadadansa 3 2 ELECTRICAL SPECIFICATIONS oncoiiciioniocc nanananiadadindanananani dadindanandindbadaddadadand incida dada adadadna dabdadaa nnen 4 2 1 Absolute Maximum RANGS essiant anaa a aiaa i D 4 Zid O 4 2 3 ROWSE S pply risiini aiii e As Gee A A A ae ee ede 4 ZA Serial GOMMUNICAIOM ciacicisscaacarerssacdcceviacarantecvdccavaadaranscandceeateasiatavaadaanasdda taiavdaduevsloasiavavaadsanaeacaresay 4 25 gt IFC COMMUNICA O Misses dzicasca ian de id dita wan da cn dZutdaah aaa daca dita a Da a EA AE sued 4 2 6 Data LOJIO it tet E ede agente A ainia 4 3 HARDWARE EE sect seca adadvena te sdeetasdsdvevasnssccaassducvadevlsscaadsdesvaaadadesvaieatesvaadadeuvaisadacvaadadesuasuansvadaulads 5 3 1 Transd cer Connections nai AAA Mia adda 5 32 Serial COMMUNICATIONS iia a reta decias 5 3 3 Linear Wall Mount Power S
12. PONSE MEANING 01CA 4 E Calibration FileContents FileContents y y 01CW 05 Store Permanently QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 14 4 5 3 Get and Write Coefficients CG channel status Get Coefficients CW channel status Write Coefficients CG copies coefficients from the non volatile memory of a transducer into Q link s RAM where it will be used for calculating pressure and temperature This function is performed automatically for each attached transducer on boot up During normal operation Q Link polls all inactive 12 channels on approximately a one second interval to see if a new transducer has been plugged in If a transducer is discovered on a formerly inactive channel its coefficients are automatically read CW copies coefficients from Q Link s RAM to the non volatile memory of the transducer Both CG and CW return the channel status for the channel that the transducer is connected to A status of 0 is normal A non zero status indicates an error 4 5 4 Calibration Information CD dd mmm yyyy Calibration Date CU 1 2 Default units alternate units Calibrated Units CR 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 file CR will return the primary range Pmax and Pmin in the default units for D1 and the secondary range Smax and Smin i
13. Quartzdyne is a standard straight through DB 9P to DB 9P cable Beware of commercially available RS 232 null modem cables where several of the pins are swapped QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 6 Hardware handshaking is not required by the protocol Since most AT type computers require DTR and CTS to be active these lines are supported through a loop back Communications are half duplex only one device may talk at a time Table 2 RS232 Cable Connections 8 CleartoSend CTS CT CTSRTS 9 RingIndicator R NWA These lines are not required for communication Signal Ground Signal Ground BA 3 3 Linear Wall Mount Power Supplies Linear power supplies are simple devices rated to provide a voltage at a given current Any linear power supply s output voltage will be greater than its rating when the load current is less than its rating For example a 3 00C 400mA supply will have a much higher output voltage if the load current is 50mA This property could potentially create an over under voltage problem if the power supply is not chosen carefully Quartzdyne recommends a 3 0 Vdc 400mA supply but we do recognize that this may not be possible for all customers The following is a table of power supply ratings that should be compatible with the Q LINK Table 3 Unregulated Power Supply Voltage vs Current Voltage V Current mA 6 0 100 5 0 100 150 4 5 150 25
14. c 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 4 3 7 4 3 4 Log Start Stop LS START starf stop STOP start 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 programmed start and stop times are reported See example in Section 4 3 7 4 3 5 Log Length LLa nnnnn Log Length Reports the number of data sets currently stored in the log 4 3 6 Log Dump LD n1 n2 time nnnn nnt nn Jal A Dump Log time nnnn nn nn h
15. charge potential static sources before handling any of Quartzdyne s electronic devices Table 1 Transducer Connector Pinout GND Pin Label Description SCL 1 A2 Device Address 2 Vcc 3VDC Output 3 A1 Device Address Vec 4 SCL 12 Clock 100KHz Max 5 SDA 12 Data 100KHz Max 6 Pin Mini DIN Connector 6 GND Ground 3 2 Serial Communications Q LINK can communicate with standard serial ports available on most PCs Communication speeds from 1200baud to 115 2kbaud are supported with 9600 baud as default Other line settings are 8 data bits 1 stop bit and no parity A multi device network may be connected using a common serial port and a Y Type cable for all devices The total cable length in a multi device network is the sum of the individual branch cables lengths Longer cables will lower the network s max baud rate 12C RS 232 RS 232 12C Sern a Digital Transducer b Figure 1 Connection Diagram a single Q Link b Multiple Q Links Digital Transducer The RS 232 port on the Q Link is directly compatible with the standard IBM AT style 9 pin serial port see Table 4 for pin functionality 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 Q LINK The RS 232 cable supplied by
16. conccccnoniconoccccanccccanoos 3 6 to 6 3 VDC Supply Current ccceceeeseeseeeeeeeeeeeeeeees 135 mA typical Q Link only T EE TE e 10 mA per Digital Transducer Recommended Power Supply 3 0 VDC 400mA Unregulated 2 4 Serial Communication RS232 IBM AT compatible 8 data bits 1 stop bit no parity Up to 115 2Kbaud Cali 9 pin DB9 M F straight through fully shielded Max 15m 2 5 lC Communication Input Voltage ooooococonnoccconnnocacinonanccncnnnanns 3V Logic Levels Internal Pull Up Resistor 10 ka Cable iia a Fully shielded Max 2m 2 6 Data Logging A arrecare aaaeei eniaint e tar iaaia Riak 896KB Storage Space Data POINTS iii e 229 376 Data Items it 76 458 data sets time pressure temperature Data Retention s es gt 10 Years Warning Unregulated supplies may have dangerously high DC voltages Do not use a supply that exceeds maximum voltage at minimum supply current See section 3 3 QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 5 3 HARDWARE 3 1 Transducer Connections The transducer interface is compatible with Q Link Digital Transducers Four female 6 Pin MiniDin Digital Transducer ports are located on the Q Link back panel see Table 1 Each connector is designed to be protected from reasonable static discharges However care should be taken to prevent static discharges to Q Link s connectors Users should properly dis
17. e 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 log data or a calibration file Invalid commands or data respond with ERROR nn where nn indicates the particular error See Section 6 A typical command response sequence is shown 01D1 D2 4522 45 120 24 017 4522 47 120 22 A copy of all programmable data is stored in nonvolatile memory 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 4 7 1 4 2 Data Access Commands 4 2 1 Read Data D 1 nnnnn nnn Primary Output Pressure D2 innnnn nnn Secondary Output Temperature D3 Nnnnnnnnn Frequency Ratio 1 D4 Nnnnnnnnn Frequency Ratio 2 Data commands are used to read the intelligent transducer data Only fresh data will be sent i e data which hasn t already been read so there may be a delay of up to one gatetime before the response is sent If data is not available for any other reason an appropriate error indicator will be sent QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 9 D1 and D2 are the calculated Primary Pressure and Secondary Temperature outputs reported in either the default or alternate calibrated units as described in Section 4 2 2 D3 and D4 are 32 bit
18. eeping chip so that time information may be included in the data log Q Link s power must be on in order for data to be logged Configuration and data are retained when power is removed If power is removed during an active logging session data logging will resume when power is restored The Log data and Log configuration are stored separately from device configuration data The EW and ER commands do not affect the data logger 4 3 1 Time Commands TM yylyy mm dd hh mm ss yyyy mm dd hh mm ss Time TS ts is Time in seconds TM and TS set or report the setting of the timekeeping chip 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 4 3 2 Log Initialize Delete LI dd dd dd dd dd TM TS D1 D4 Initialize Log LI initializes the data logging functions for a channel or all channels if 0OLI is used and programs which data items will be stored This command may take several seconds to complete because it may have to erase the flash memory which is a time consuming process The response will come after any erasing of memory is finished The data in the log is stored as
19. everal transducers are monitoring a process which is changing rapidly In this case the command should be sent in the global mode All intelligent transducers will invalidate any current data and begin the next gate cycle immediately Synchronized data will be available after the gate closes and calculations are completed Once synchronized the transducers should remain synchronized for several minutes 4 5 Calibration Commands 4 5 1 Span and Zero S 1 2 span range spama Span Adjust Z 1 2 zero zeron Zero Adjust QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 13 The S and Z commands set the span and zero for two point calibrations S 1 and Z 1 refer to the primary output 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 i us x Dear zero max 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 Dacmat Dineasured Enter the zero using the Z command 012Z1 zero zeron Next data is taken at a known point near full scale Span
20. he overlapping of address ranges To avoid conflict the address of a second Q Link must be changed from the default of 01 while it alone is connected to the serial port QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 15 00AD 05 Global Assumes only 1 device on bus 05AD 057 Confirm change 05EW On Permanently store new address 4 6 2 Baud Rate BR baud nnnn Baud Rate The baud rate command allows communications at any of the following baud rates 1200 2400 4800 9600 the default 19200 38400 57600 and 115200 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 If the baud rate of a device is not known it will be necessary to issue a series of command requests at the baud rates listed above until a valid response is obtained HO1BR 1200 Communicating at 1200 Baud 01BR 9600 9600 Set 9600 Baud reply still at 1200 Change Baud rate of host to 9600 01EW 0 Store new baud rate at 9600 Baud 4 6 3 Reset X Reset This command cycles power to the 12C ports A D resetting all attached transducers Following this a watchdog timeout is forced on Q Link itself rebooting it The purpose of this command is to allow the operator to remotely cause a full reset in case of a transducer or Q Link glitch 4 6 4 Firmware Version VE RI Ver 2 01 03 02 0
21. hem 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 because 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 4 8 In application Programming Feature Q Link has an in application programming feature meaning that its firmware can be upgraded via the RS 232 serial port As new versions of the software are developed these will be posted on Quartzdyne s website www quartzdyne com for downloading The QConsole application supplied by Quartzdyne is used to upload the software updates into the Q Link QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 17 5 COMMAND SUMMARY D 1 D2 D3 D4 UN 1 n name UN2 n name UP n name scale offset S 1 2 span range Z 1 2 zero CA L file contents CD CU 1 2 CR cr 12 Ma ID CG CW GA gatetime TR gt VES VE R AD address BR baud X EM nn ES ER EW TM yylyy mm dd hh mm ss TS ts LI dd dd dd dd dd LR nsec AND OR Dn step LS START starf stop STOP LL LD n1 n2
22. is calculated as span Dacmal Dmeasurea Enter the span adjustment using the S command 01S1 span Dineasured 7 span The returned span will have been adjusted for the calibrated full scale load Use the EW command Section 4 7 1 to store the changes permanently 01EW 0 Note Two point calibration trimming is not generally recommended for QUARTZDYNE Transducers 4 5 2 Full Calibration CA L file contents file contents Full Calibration CA accepts and echoes a hex coefficient file in the format provided by Quartzdyne The format of this file is described in the digital transducer user s manual and documentation disk The file contents are sent with surrounding braces Both primary and secondary coefficients are included in the hex coefficient file If the file s format is incorrect or if its checksums are not received correctly an error will be returned and the coefficients will be marked as invalid Coefficients may be restored to a valid state by sending a correct coefficient file via the CA command Note that the CAL command reads or stores coefficients from or in Q Link RAM which is only temporary To copy the coefficients to the non volatile memory in the transducer itself making them more permanent use the CW command described below In the example below the full command is sent before any response is received Previous coefficients may be restored by rebooting Q Link or by issuing the CG command COMMAND RES
23. n the default 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 name of the default and alternate calibrated units from the calibration file For QUARTZDYNE Pressure Transducers the standard calibration types and units are Pressure in psi or Bar and Temperature in C or F 4 5 5 Transducer Information M nnnnn nnnn Model Number ID nnannnnnn Serial Number The M and ID commands return the model and serial number as downloaded in the coefficient file 4 6 Communications Protocol Commands 4 6 1 Device Address AD address nn Q Link Base Address The address command sets the Q Link base address The response will be the new address Base addresses are limited to numbers between 01 and 96 Because the Q Link has four device ports and because each device requires its own unique address each Q Link uses a range of four consecutive addresses beginning with the base address For example if the Q Link address is set to 01 the default the devices connected to it may be accessed using addresses 01 04 with 01 corresponding to the port labeled A and so forth If multiple Q Link modules are to be connected to the same serial port they should be programmed to unique address ranges In other words assuming that the base address of the first Q Link is 01 a second Q Link connected to the same serial port should be set to address 05 or greater to avoid t
24. rs a vertical bar indicates alternate parameters Uppercase letters indicate literal expressions lowercase letters indicate data formats and italics represent data values and descriptions The 3 character indicates a CR LF sequence Commands are prefixed by the hash character followed by two numeric digits which indicate the address Up to four devices may be connected to each Q Link Because each device must have its own unique address the Q Link will occupy a range of four consecutive addresses on the bus For example if the Q Link is set at address 01 the default its four devices can be accessed using addresses 01 through 04 The connector on the left labeled A will be associated with the lowest address and so forth Address 00 is an all call or global command all Q Link modules on the bus will execute the command but none will reply If multiple Q Link modules are to be used on the same serial port their addresses must include unique ranges For example a second Q Link could be set to use addresses 05 08 The Q Link base address may be changed by issuing the AD set address command Please refer to Section 4 6 1 for more details about the AD command Commands and responses are terminated by 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 b
25. s 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 If errors persist after the suggested corrective action has been taken please note the conditions and status codes and report them to Quartzdyne Table 4 Hardware Status Bit Definitions Bit ___ Value Meaning Corrective Action jo 4 No Pressure Frequency Check Transducer and Cable Check Transducer and Cable Check Transducer and Cable 3 lea BadorNo Coefficient File Download Coefficients Check Transducer Download Coefficients Replace Battery e 64 Bad Command i Check Host Software Check Battery Hardware Problem 8 s PEE 12 fe eee Reduce Baud Rate or RS232 Traffic Increase Gate Time Reduce Baud Rate of RS232 Traffic Increase Gate Time Zero Divide Software Error Hardware Problem Hardware Problem Check Transducer and Cable 4 7 3 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 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 6 Some error states are persistent causing t
26. ted for data logging and device settings A real time clock is included for time stamping data The Q Link provides four digital transducer ports one RS 232 communications port and one power input port The serial computer interface allows the user to select the units of pressure and temperature and permits zero and span adjustments The user can select which data is transmitted to the computer Q Link automatically downloads any connected digital transducer s coefficient file User selected options such as units of pressure and temperature can be written to memory so that the Q Link operates in the desired mode on power up A user friendly Q Link update software package can be downloaded from www quartzdyne com The software will automatically load the new firmware via RS 232 into the Q Link s flash memory Quartzdyne also provides a Q Link interface software package that simplifies the setup QLinkManual200809 doc Quartzdyne Q Link Operating Manual September 2008 Page 4 2 ELECTRICAL SPECIFICATIONS 2 1 Absolute Maximum Ratings Supply Voltage oooonooconcccnnnnicinociconcccccnnns 0 to 6 8V Supply Current cccccceeeeeeseeeeeeseeeeeees 300mA 2 2 Environmental Operating Temperature 0 to 60 C Storage Temperature cccceeeeeeees 40 to 80 C Herimeticity Leraar a erinan Sa Dust Proof 2 3 Power Supply Power Supply Connector 0 0cceee 3 5 x 1 3 mm center positive P 7 Supply Voltage ooonocc
27. upplies cccccceeseeceeeeeceeeeecaeeeeeaeeceaeeecaaeseeaaeseeeeseaeeesaeeseeeeeseaeeeas 6 3 4 Battery Replacement serion teinar eE i tse esti E epee vases heehee Sake ene 7 4 COMMUNICATIONS PROTOCOL ccccceceeeeeeeeeeeeeeeeseeeeeseseeeseseseseseseeseeeseseseseseseeeeeseeseeeesessseusnsnsess 8 4 1 Command SUCIAS ici da del a E AED a E di da 8 4 2 Data ACCESS Com MaN S cccciisacoteiduacovenacacavettoavavevaaanwertarehcunuatoawistavaaducesdeacuntbveheusuanoiadetendvaventhvaapents 8 4 2 1 Read Data aia A AAA AS 8 4 2 2 SOlSCHU MTS A A AA e A a A a A AN 9 4 2 3 Program UNES iii A A an aig A Aine de A 9 4 3 Data Logging COMMAnd S cccceccceeececeeee eee eeeeaeeeeeeeeceaeeeeaaeeseaeeseaeeecaaeeesaaesdeeeeseaeeeesaeeseneessaees 10 4 3 1 TIME COMME E a da dd 10 4 3 2 Log Initializa Delete ot de 10 4 3 3 LOG Rate viii E aM ag a A el 11 43 4 Eog Start Stop neinte ein ei aea e oath pleat eet na e a atin eh cen Mae ee 11 4 3 5 LOG Lengua as A diel nadine eters A ete 11 4 3 6 ore a Bla e MEEA E EA A A E ATA ert ree reer rere RI ANAA 11 4 3 7 Data Logging Example ninietan dd 12 4 4 Frequency Counter Commands ccccccecceceeeeeeeeeeeeeeeeceeeeecaaeeseaaeeeeeeeesaeeesaaeeeeaeeseeeessaeesenaeessaes 12 4 4 1 Eta E caian a AA AA tas 12 Ada MO A ets 12 4 5 Calibration Command Svo ii a a a E Mala cud A ELE da doth a bl alee 12 4 5 1 Span and ZOO trinidad Aten een deat lenis halon erie cries hie ates 12 4
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