Omega iDRX-ACC, User Manual

Page 1: ... iDRX ACV iDRX FP iDRX PR iDRX RTD iDRX ST iDRX TC Communication Manual for iDRX Signal Conditioner Series User sGuide omega com e mail info omega com For Latest Product Manuals omegamanual info Shop on line at ...

Page 2: ... this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for patient connected applications This device is marked with the international caution symbol It is important to read the Setup Guide before install...

Page 3: ...CESSING EEPROM 5 V DESCRIPTION OF DATA 7 VI COMMANDS FOR MEASUREMENT VALUES 16 VII COMMANDS FOR READING MODEL INPUT TYPE 17 VIII RESET COMMANDS 17 IX SAMPLE PROGRAM 18 X MODBUS REGISTER DEFINITIONS 20 SPECIFICATIONS iDRX ACC 22 iDRX ACV 23 iDRX FP 24 iDRX PR 26 iDRX RTD 27 iDRX ST 28 iDRX TC 29 ILLUSTRATIONS Dimensions 30 Typical Computer Setup 30 i ...

Page 4: ...o rain or moisture Unit mounting should allow for adequate ventilation to ensure instrument does not exceed operating temperature rating Use electrical wires with adequate size to handle mechanical strain and power requirements Install without exposing bare wire outside the connector to minimize electrical shock hazards EMC Considerations Whenever EMC is an issue always use shielded cables Never r...

Page 5: ... levels are changed All set up may be done by using the Set up Software running on a computer or by user supplied programs II MODEL OF UNIT There are 7 models available THERMOCOUPLE iDRX TC RTD iDRX RTD STRAIN iDRX ST PROCESS iDRX PR FREQUENCY PULSE iDRX FP AC VOLT iDRX ACV AC CURRENT iDRX ACC III RS485 SERIAL COMMUNICATION SETUP Communication with the UNIT will be performed via serial communicati...

Page 6: ...blished To check the communication any of the commands may be tried i e 01X01 would return the current measured signal value For Hyper Terminal Windows 95 Start the Hyper Terminal Program from programs accessories Click on the Properties from the File menu Under the Phone Number Menu choose Connect using Direct to COM1 or COM2 whichever that s available Click on Configure Button Choose Baud rate D...

Page 7: ...e label if different from default Resetting Communication Parameters to Factory Defaults To restore the communication parameters to the factory default settings two test points must be shorted together There are two ways of shorting these test points together both are detailed below and shown in the following figure Version A Test point TP6 must be shorted by a wire to test point TP17 or Version B...

Page 8: ...nt Panel Power Indicator LED will NOT turn on 5 After power has been applied to the unit for about 3 seconds remove jumper S1 A or open the TP6 TP17 connection without turning off the power 6 The communication parameters now have been restored to the default settings temporarily in RAM memory If power is removed from the unit the RAM memory will be lost and the communication parameters will be los...

Page 9: ...d Odd Parity 7 Data Bits 1 Stop Bit 10 To permanently write the above default communication parameters to EEPROM send the following sequence of commands 01W0B2A Unit Response 01W0B 01W0A01 Unit Response 01W0A 01W081C Unit Response 01W08 01W070D Unit Response 01W07 01Z01 Unit Response 01Z01 LED on iDRX unit will blink 11 The default communication parameters are now permanently stored in the unit s ...

Page 10: ...ion recog char 1 12 R W 0C Unit of measure 3 13 R W 0D Gate time 1 14 R W 0E Debounce time 1 15 R W 0F Transmit time 2 16 R W 12 Reading Scale iDRX PR 3 17 R W 13 Reading Offset iDRX PR 3 NOTE 1 Data Number of hex digits 2 number of bytes 2 command letter meaning R Read from EEPROM W Write to EEPROM 3 W commands should be followed by Z01 command for new values to take effect A COMMAND FORMAT TRANS...

Page 11: ... address in hexadecimal default is 01 Address may be from 01 to FF C Is the command letter must be capital W For writing to the EEPROM requires data R For reading from the EEPROM doesn t require data xx Command index is a hexadecimal number from 01 to FF data Is one two or three bytes 2 4 6 characters respectively It will be in hexadecimal format except when command X is executed in which case it ...

Page 12: ... DESCRIPTION OF DATA For the following Bit Pattern The LSB is always bit 0 Bit numbers are always counted from right to left with the rightmost digit being bit 0 and the next to the left would be bit 1 1 INPUT RANGE This is one byte data 2 characters This byte will specify input range and other input configurations of each model Bit pattern for different models a INPUT RANGE BYTE VALUE TC ACV ACC ...

Page 13: ... frequency 60Hz 1 Line frequency 50Hz c INPUT RANGE BIT NO VALUE PROCESS PR STRAIN ST 3 0 0000 0 20 mA 30 mV 0001 400 mV 100 mV 0010 1 V 0011 2 V 0100 5 V 0101 10 V 0110 1111 not used 4 0 14V Excit Internal excit 1 10V Excit External excit 5 0 Non ratiometric PR ST 1 Ratiometric PR ST 6 0 Disable Reading Scale and Offset 1 Enable Reading Scale and Offset 7 0 Line frequency 60Hz PR ST 1 Line freque...

Page 14: ...byte data 2 characters Bit pattern is BIT NO VALUE MEANING TC RTD ACV ACC ST PR FP 1 0 00 Degree C 01 Degree F Freq mode 10 Degree K Totalizer 11 Degree K Totalizer Freq mode 2 0 Temp compensation See Note 1 1 No temp compensation See Note 1 Quadrature 3 0 See Note 1 1 See Note 1 A B mode 4 0 1 Totalize mode 5 0 1 Square root 7 6 not used set to 0 Note 1 Bit 2 3 set the speed of process totalize T...

Page 15: ...This is one byte 2 characters as value meaning 1 XXXXXX 2 XXXXX X 3 XXXX XX 4 XXX XXX 5 XX XXXX 6 X XXXXX Note 1 For TC and RTD models value must be 1 to 3 only 4 FILTER TIME CONSTANT This is one byte 2 characters as value meaning per no of readings 0 No filtering 1 2 2 4 3 8 4 16 5 32 6 64 7 128 Page 11 ...

Page 16: ...45678 345678 x 10 9 value will be 345678 decimal 5464E hex bit 19 1 for negative bits 20 23 DP 10 A hex then data will be AD464E hex 6 ANALOG OUTPUT READING OFFSET Deviation applied to input to get a higher or lower reading This is 3 byte data 6 characters as follows Bits 0 to 19 are value from 0 to 1000000 Bit 23 is sign 0 for positive 1 for negative Bits 20 21 22 are decimal point value DP It me...

Page 17: ...ys 0 Note 1 Stop bit is always 1 Unless 7 data no parity is selected then unit will use 2 stop bits Note 2 When 8 Data bit is selected only NO PARITY is allowed 8 BUS FORMAT This is one byte data as Bit 0 0 1 means checksum not included included Bit 1 not used Bit 2 0 1 means no echo echo Bit 3 1 means 485 mode Bit 4 0 1 means continuous command mode Bits 7 5 not used For models PR ST FP Bit 7 0 1...

Page 18: ... include valley reading For models PR ST FP bit 3 0 1 Means do not include include peak reading For models TC RTD ACV ACC bits 4 Not used Set to 0 For models PR ST FP bits 4 0 1 Means do not include include valley reading bit 5 Not used Set to 0 bit 6 0 1 Means do not include include unit of measure bit 7 0 1 Means space carriage return between values 10 DEVICE ADDRESS This is one byte data and sp...

Page 19: ...lue 00 to FA Each count equals 10ms If 0 then gate time 3ms Example 1 second gate time 64 hex For value FB to FF Value Gate time FB 5 seconds FC 10 seconds FD 20 seconds FE 40 seconds FF 80 seconds 14 DEBOUNCE TIME For FP model only This is 1 byte from 01 to FF Each count equals 5ms If 0 then error 15 TRANSMIT TIME This is 2 bytes data in second and specifies the time of the transmission by the me...

Page 20: ...1X03 Valley reading Models PR ST FP 01X03 Peak reading value 01X04 Valley reading 01V01 For all models String of values Received values are in decimal with decimal point and no sign for positive and minus sign for negative Example 00345 6 or 00345 6 If value is overflowed a will be transmitted along with value 99999 or 999999 VII COMMANDS FOR READING MODEL INPUT TYPE Command Receiving value 01U01 ...

Page 21: ...3 For models TC RTD ACV ACC Reset peak and valley For models PR ST Reset process totalize value 01Z04 For models PR ST FP Reset peak value 01Z05 For models PR ST FP Reset valley value 01Z07 For models TC RTD ACV ACC Reset peak only 01Z08 For models TC RTD ACV ACC Reset valley only NOTE Recognition character 01 Follow Address Page 17 ...

Page 22: ... GOTO ER ON TIMER 1 GOSUB RDG CLS CLOSE 1 COLOR 1 7 LOCATE 22 30 PRINT PRESS ESC TO END OPEN COM1 9600 O 7 1 CS DS FOR RANDOM AS 1 LOCATE 10 30 PRINT READING TIMER ON DO LOOP UNTIL INKEY CHR 27 COLOR 7 0 CLS END RDG PRINT 1 01X01 DAT1 DAT T TIME T1 MID T LEN T 1 2 T1 VAL T1 DO IF LOC 1 0 THEN CNT 0 DAT1 INPUT LOC 1 1 DAT DAT DAT1 ELSE T TIME T2 MID T LEN T 1 2 T2 VAL T2 IF T2 T1 THEN T2 T2 60 IF T...

Page 23: ... CHR 13 0 IF DAT THEN LOCATE 5 30 COLOR 28 PRINT COMMUNICATION ERROR P 1 ELSE IF P 1 THEN LOCATE 15 30 COLOR 7 0 PRINT 24 SPACES P 0 END IF LOCATE 10 40 D MID DAT 6 DAT LEFT D LEN D 1 COLOR 1 7 PRINT DAT 2 SPACES END IF RETURN ER RESUME NEXT ...

Page 24: ...alue Hard Reset 3 11 Peak Value Reset Peak 1 12 Valley Value Reset Valley 1 13 Not Supported M S bytes Output Scale 2 14 Not Supported L S byte Output Scale 1 15 Not Supported M S bytes Output Offset 1 16 Not Supported L S byte Output Offset 2 Note 1 Main Peak Valley value 4 bytes will send from the unit a Highest byte always 00h b 2nd Highest byte MSB is sign 1 negative 0 positive next 3 bits are...

Page 25: ...ain Value Hard Reset 3 11 Peak Value Reset Peak 1 12 Valley Value Reset Valley 1 13 Not Supported L S bytes Output Scale 2 14 Not Supported M S byte Output Scale 1 15 Not Supported M S bytes Output Offset 2 16 Not Supported L S byte Output Offset 1 Note 1 Main Peak Valley value 4 bytes will send from the unit a Highest byte always 00h b 2nd Highest byte MSB is sign 1 negative 0 positive next 3 bit...

Page 26: ... full scale for 10 seconds ANALOG TO DIGITAL TECHNIQUE Dual slope READ RATE 3 readings second ACCURACY AT 25 C 0 2 of FS from 30 Hz to 1 KHz TEMPERATURE STABILITY 10 100 mA Range 100 ppm C typical 1 Amp Range 150 ppm C typical 5 Amp Range 200 ppm C typical STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the c...

Page 27: ...AT 25 C 400 mV 4V 40V and 400V ranges 49 Hz to 500 Hz 0 2 of FS 30 Hz to 1KHz 0 2 of FS 10 counts TEMPERATURE STABILITY 400 mV and 40 Volt range 150 ppm C typical 4V and 400 Volt range 100 ppm C typical STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the carriage return CR it will be sent at the end of the re...

Page 28: ...for Input Level 0 12 V Quadrature Reset input used as second input Range 99999 to 999999 if reading is larger than 999999 then reading is converted to floating point number i e 9 99E9 minimum 9 99E9 maximum Max Input Frequency 30 KHz for Input Level 0 5 V Max Input Frequency 25 KHz for Input Level 0 12 V Resolution is 1 count ISOLATION Dielectric strength per 1 minute test based on EN 61010 for 50...

Page 29: ...xample Connecting different signal sources 1 2 3 4 1 2 3 4 J2 J2 J2 J2 Excitation Quadrature Encoder A B 1 2 3 4 J2 EXC EXC A B 1 2 3 4 1 2 3 4 J2 J2 J2 J2 Excitation Quadrature Encoder A B 1 2 3 4 J2 EXC EXC A B Totalize A B Mode 1 2 3 4 J2 Quadrature Mode ...

Page 30: ...ize ANALOG TO DIGITAL TECHNIQUE Multiple slopes READ RATE 8 readings second automatic polarity ACCURACY AT 25 C 0 1 of FS 2 counts TEMPERATURE STABILITY 100 ppm C typical STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the carriage return CR it will be sent at the end of the response You can send another comm...

Page 31: ...CHNIQUE Multiple slopes READ RATE 8 readings second automatic polarity ACCURACY AT 25 C 0 2 of FS 2 counts TEMPERATURE STABILITY 75 ppm C typical STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the carriage return CR it will be sent at the end of the response You can send another command after you receive the...

Page 32: ...DIGITAL TECHNIQUE Dual slope READ RATE 3 readings second automatic polarity ACCURACY AT 25 C 0 5 C for platinum RTD s TEMPERATURE STABILITY 0 05 C C STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the carriage return CR it will be sent at the end of the response You can send another command after you receive ...

Page 33: ...UT OVER VOLTAGE PROTECTION 250 V AC for 1 minute ANALOG TO DIGITAL TECHNIQUE Dual slope READ RATE 3 readings second automatic polarity ACCURACY AT 25 C 1 C for temperature above 150 C 2 C for temperature below 150 C TEMPERATURE STABILITY 0 05 C C STEP RESPONSE FOR RS485 OUTPUT 2 seconds to 99 of the final value Filter time constant 64 RESPONSE TIME To verify the response time check the carriage re...

Page 34: ...TYPICAL COMPUTER SETUP COMPUTER CONNECTION DB9 or DB25 RJ12 CONNECTOR with CABLE ADAPTOR DB9 25 to RJ12 DB9 RJ12 DB25 RJ12 COMPUTER POWER CONNECTION RS 232 to RS 485 CONVERTER HALF DUPLEX CAT 285 SIGNAL CONDITIONER MODULE ...

Page 35: ...ages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as ...

Page 36: ...ocity Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial pH Conductivity Equipment DATA ACQUISITION Data Acquisition Engineering Software Communications Based Acquisition Systems Plug in Cards for Apple IBM Compatibles Datalogging Systems Recorders Print...