Series it2000 User`s Manual
Contents
1. 24 aTe OK EEEE E EE AT EN ER nin RS 232 Transducer Digital Communication User s Manual CHAPTER 1 Installation This chapter describes the steps to install the RS 232 Transducer Contents amp RS 232 CONMECHOL uere Reto eere eter exse ar ed reve pcs thc Ta ERR RE Communication Setup eene 6 RS 232 Transducer Digital Communication User s Manual RS 232 Connector Serial data is transmitted and received using only three signals of the RS 232 connector All digital output signals are galvanically isolated from the transducer excitation supply Pin 2 TxD Pin 3 RxD Pin 5 De6npb Figure 1 1 RS 232 pin assignments Chapter 1 Installation 7 Communication Setup The RS 232 Transducer uses an RS 232 interface as a means of communication with a controller The default communication parameters are as follows Setting Value Baud rate 9600 Data bits 8 Stop bits 1 Parity none Flow control none Table 1 1 RS 232 communication settings Commands are sent in ASCII text using the syntax described Chapter 3 Using Commands All commands must be terminated with a carriage return line feed combination or a line feed only character sequence RS 232 Transducer Digital Communication User s Manual CHAPTER 2 Quick Start Tutorial This chapter gives you a quick guide on how to connect Series it2000 Press2. followed by any information the transducer needs to execute the command or query Command messages consist of five different element types defined as follows Symbol Meaning Header The basic command name If the header ends with a question mark the command is a query The header may begin with a colon character if the command is concatenated with other commands the beginning colon is required The beginning colon can never be used with a command beginning with an asterisk Mnemonic A header sub function Some commands headers have only one mnemonic If a command header has multiple mnemonics they are always separated from each other by a colon character Chapter 3 Using Commands 13 Symbol Meaning lt Argument gt A quantity quality restriction or limit associated with the header Not all commands have multiple arguments Arguments are separated from the header by a lt Space gt Arguments are separated from each other by a lt Comma gt lt Comma gt le comma between arguments of multiple ent commands It may optionally have white M space characters before and after the comma Space A white space character between command header and argument It may optionally consist of multiple white space characters Table 3 2 Command Message Elements Header Comma WORKset DEFAult SAMPLE ON NON Mnemonics Space Arguments WO
3. in the range 1 9 Dig A digit character in the range 0 9 lt DChar gt A character with the hex equivalent of 00 through FF hexadecimal 0 through 255 decimal lt Block gt A block of data bytes defined as lt Block gt lt NZDig gt lt Dig gt lt Dig gt lt DChar gt 0 lt DChar gt lt terminator gt Table 3 6 Block Argument Types 16 RS 232 Transducer Digital Communication User s Manual NZDig specifies the number of Dig elements that follow Taken together the Dig elements form a decimal integer that specifies how many lt DChar gt elements follow Command Usage Rules Itis important to keep the following rules in mind when using the commands in this reference guide 1 2 Commands are case insensitive All commands are terminated by a carriage return line feed combination or a linefeed All arguments are required Multiple arguments must be separated by a comma String arguments are case sensitive unless they are a mnemonic Syntax Diagrams The syntax diagrams in this manual use the following symbols and notation Circles and ovals contain literal elements Most elements must be sent exactly as shown The diagrams show command mnemonics in both upper and lower case to distinguish between complete and abbreviated spellings These elements are not case sensitive and you can omit the lower case portion of the mnemonic Boxes contain the def
4. 5 lt Range lt 50 00 000 50 lt Range lt 500 000 00 500 lt Range lt 5000 0000 0 5000 lt Range 000000 meas pres 114 135 Chapter 4 Command Reference 19 MEAS TEMP Returns a temperature measurement Syntax MEAS TEMP channel TEMP Jj channel One Suffix channel Parameter Result none Temperature from the on chip temperature sensor default 0 Temperature from the on chip temperature sensor 1 Temperature from the RTD optional Remarks The unit of measure is degrees Fahrenheit Temperature output is fixed to the following format 000 00 Example meas temp 078 91 MEAS ALL Returns a pressure and temperature measurements Syntax MEAS ALL CES G C A Remarks First value pressure measurement second value on chip temperature measurement or RTD temperature if there is one present third value optional on chip temperature measurement if RTD is present Example meas al1 4078 50 4123 24 20 RS 232 Transducer Digital Communication User s Manual Test Commands TEST INP Syntax Suffix Remarks Example TEST OUTPV Test commands allow to calibrate digital and analog output of the Series it2000 pressure transducer Reads digital counts from selected channels TEST INP channe l INP gt gt channel O channel Possible values 5 Parameter Result 5 Digital pressure and temperature count
5. asin tatanitnrveraveussessusvecdaes TE ATE 6 Communication SOUP P MH 7 Chapter 2 Quick Start Tutorial cccsiscccossssssecsossssocconssssennsossocvnssessesesnesssoeconcsssvecesens DD BaSiG Meas remehts 2 Donec ecole tree te c estie en en ettet o b deoa eased baa Uvade vesica dia dad 10 Chapter 3 Using Commanuds ceres eese eere eese eene eee essseseeesesseseeesesseeeeesssee TT Command and Query Structure siisti suenen iiias in ESSR A ennemi tenen nennen 12 Command EntEy tte tei er opes get inteso eere tarte pe aee d e a 13 Argument DY POS e 14 Command Usage R les 5 p Deer nitt eredi ro toi tote ode epi olera bue iiaa rado rae RR Rega 16 Syntax Diaptra MS ge E 16 Chapter 4 Command Reference sseessosssscsessossssosssosessosesoosssosesoosssosessosssosessoseosessse 17 Meas re SuDSyVSteT uc e te E EE E E EEE EE A R deve E E E R TAR 18 MEAS PRES T E E E ET 18 MEAS TEMP cierran 19 A Sa A E E E EE EEE 19 Test Commands 34 eti rettet Ne sas pe EA RE ee ASES Ea o ea E EEEE a E E E 20 TESTIN P iom nete i Eher le tette EEEN De Ur ee LS EEEa eR ae CORR EE EEN 20 TES KOUT PV ES 20 System Gone 22 SYSEVERS EIRM nc rre te eer Pee e e ae e Prot t eo Ce rte euer re EN eene iT 22 SPAN SET fisdescencenvebsden ce cece oni RH DER e e rer bseeate Uo e Ue Hae ta ee EP Pee SEEN XR ense erp etS 23 iHe PI 24 TEIMER SE Morroia
6. RKset C DEFAult Space E lt name gt comma e state Figure 3 1 Command Message Elements Commands Commands cause the transducer to perform a specific function or change one of its settings Commands have the structure Header Space Argument Comma Argument A command header is made up of one or more mnemonics arranged in a hierarchical or tree structure The first mnemonic is the base or root of the tree and each subsequent mnemonic is a level or branch off the previous one Commands at a higher level in the tree may affect those at a lower level The leading colon always returns you to the base of the command tree Queries Queries cause the transducer to return information about its status or settings Queries have the structure Header Header Space Argument Comma Argument Command Entry Follow these general rules when entering commands Commands can be entered in upper or lower case 14 RS 232 Transducer Digital Communication User s Manual Any command can be preceded with white space characters White space characters include any combination of the ASCII control characters 00 through 09 and OB through 20 hexadecimal 0 through 9 and 11 through 32 decimal The transducer ignores commands consisting of any combination of white space characters and line feeds Suffixes Some mnemonics have a plural
7. RS 232 Transducer Digital Communication User s Manual Firmware Version 217928G Stellar Technology Incorporated Copyright Notice 2004 Stellar Technology Incorporated All rights reserved This manual as well as the software described in it is furnished under license and may be used or copied only in accordance with the terms of such license The content of this manual is fur nished for informational use only is subject to change without notice and should not be con strued as a commitment by Stellar Technology Incorporated Stellar Technology Incorporated assumes no responsibility or liability for any errors or inaccuracies that may appear in this book Except as permitted by such license no part of this publication may be reproduced stored ina retrieval system or transmitted in any form or by any means electronic mechanical recording or otherwise without the prior written permission of Stellar Technology Incorporated it2000 is a trademarks of Stellar Technology Incorporated it2000 logo and the STI logo are trademarks of Stellar Technology Incorporated in the USA Microsoft Windows 9x NT 2000 XP CE Microsoft Access and Microsoft Excel are registered trademarks of Microsoft Corporation All other products or name brands are the trademarks of their respective holders Part number 222133 Rev A Contents Chapter 1 Installation P R5 232 CODICE siccsivsesecatstasslcocbuosdrcosiaues dake sdvove tas
8. e teste hee o eo Eee 17 Argument Types 2 eroe pee ERE Mar cU evoca bee MRD 18 e Command Usage Rules eere 20 e Syntax Diagrams seereis ni nr nb en d pe Ronnie reet edes i 20 RS 232 Transducer Digital Communication User s Manual Commands are transmitted to the transducer using the American Standard Code for Information Interchange ASCII character encoding This manual uses Backus Naur Form BNF notation and syntax diagrams to describe commands and queries The following BNF symbols Symbol Meaning lt gt Defined element eS Is defined as Exclusive OR Group one element is required L Optional can be omitted Previous element s may be repeated Q Comment Table3 1 BNF Symbols and Meanings Command and Query Structure Commands consist of set commands and query commands usually simply called commands and queries Commands modify instrument settings or tell the transducer to perform a specific action Queries cause the transducer to return data and information about its status Most commands have both a set form and a query form The query form of the command is the same as the set form but with a question mark at the end For example the set command INPut GAIN has a query form INPut GAIN Not all commands have both a set and a query form some commands are set only and some are query only A command message is a command or query name
9. erican Standard Code for Information Interchange 7 12 14 15 Backus Naur Form BNF 12 Basic Measurements 10 C carriage return 7 14 16 case lower 13 15 16 upper 13 15 16 channel 20 Command Entry 13 Argument Usage 14 Command Termination 14 Suffixes 14 Command Reference 17 Input Subsystem INPut OFFSet VALUE 23 Measure Subsystem 18 MEASure ALL 19 PRESsure 18 TEMPerature 19 UNIT PRESsure 19 System Commands 22 IDN 22 RST 22 SYSTem VERSion FIRMware 22 Test Commands 20 TEST INPut 20 OUTPV 20 Trigger Subsystem TRIGger PRESsure 24 Command Usage Rules 16 Commands and Query Structure 12 Commands 13 Queries 13 communication port 10 Communication Setup 7 D digital count 20 output 20 23 pressure 10 temperature 10 digital to analog converter 21 F firmware 22 G gain 12 L line feed 7 14 16 M message 12 15 mnemonic 12 13 14 16 0 offset input 23 output voltage 20 R RS 232 6 7 11 S Standard Commands for Program mable Instruments SCPI 14 suffix 20 Syntax Diagrams 16 W white space 13 14 Wiring Harness RS 232 Connector 6 28 RS 232 Transducer Digital Communication User s Manual
10. form The mnemonic that is expressed in plural form indicates that it represents more than one instance of a subsystem This is illustrated as follows TEST INP5 All suffixes have a default value of one and is used when the suffix is not specified Suffixes are enclosed in brackets in the command syntax descriptions to indicate their optional inclusion The brackets are not to be included in actual usage Command Termination All commands are terminated with a carriage return line feed combination The SCPI specification also allows for the use of a line feed character only The ASCII codes for these command terminators are as follows ASCII Code Key Stroke Description 10 Control j Line feed 13 Control m Carriage return Table 3 3 ASCII Codes for Command Termination Argument Usage All arguments listed for a command are mandatory and must be specified by at least a placeholder Multiple arguments must be separated by a comma String arguments are case sensitive unless otherwise noted Those arguments that are actually mnemonics themselves follow the same abbreviation options as described above Argument Types The argument of a command may be in one of several forms The individual descriptions of each command tell which argument types to use with that command Numeric Arguments Many transducer commands require numerical arguments The syntax shows the format that the transducer returns in respo
11. iginal value Default value is 100 turndown set 50 Ifthe pressure transducer has 0 5 V output at 0 200 PSIG after setting turndown 50 output will be 0 5 V at 0 100 PSIG Digital pressure measurement is not affected turndown set 50 000 Sets or returns timer settings The it2000 will send pressure and temperature readings over a RS 232 in the specified time interval TIMER SET type value Q SET Space gt type comma ftp value Syntax TIMER SET TIMER Parameters type This value specifies a time interval type Possible values 0 3 Parameter Result 0 Interval measured in 1 128 of a second Interval measured in seconds 1 2 Interval measured in minutes 3 Interval measured in hours Chapter 4 Command Reference 25 Remarks Example value Numeric value from 0 to 255 This value determines a time interval in specified units of measure Value set to 0 will stop the timer function In 1 128 mode not every setting will result in a proper response rate due to the IT2000 performance limitations timer set 1 100 timer set sec 100 26 RS 232 Transducer Digital Communication User s Manual Index Symbols asterisk 12 colon 12 13 A analog output 20 21 23 argument 13 14 15 Argument Types 14 Block Arguments 15 Numeric Arguments 14 Quoted String Arguments 15 ASCII Am
12. ined elements described earlier in this section such as lt NR3 gt or lt QString gt Elements are connected by arrows that show the allowed paths through the diagram and thus the orders in which you can send the elements Parallel paths show that you must take one and only one of the paths A path around a group of elements shows that those elements are optional Loops show elements that can be repeated Here are some examples of typical syntax diagrams ae O cua a CHAPTER 4 Command Reference This chapter describes each of the commands used to configure and control the RS 232 Transducer The command reference is broken down into several groups of related functionality Contents Measure Subsystem oo eese 20 dest Commands 55er rentes a en Pa cedeccdevebacssace 22 System Commatrids ice terere ene ete Pers 24 RS 232 Transducer Digital Communication User s Manual Measure Subsystem MEAS PRES Syntax Remarks Example The measure subsystem includes commands for initiating pressure and temperature measurements Returns a pressure measurement MEAS PRES HS O E The unit of measure is PSI Pressure output is fixed at 7 characters with a first sign character followed by a number with resolution based on a following table Pressure range Output format 0 lt Range lt 5 0 0000
13. nse to a query This is also the preferred format when sending the command to the transducer though it will accept any of the formats This manual represents these arguments as follows Chapter 3 Using Commands 15 Symbol Meaning lt NR1 gt Signed integer value lt NR2 gt Floating point value without an exponent lt NR3 gt Floating point value with an exponent Table 3 4 Numeric Argument Types The transducer will automatically force most numeric arguments to a valid setting either by rounding or truncating when you input an invalid number unless otherwise noted in the command description Quoted String Arguments Some commands accept or return data in the form of a quoted string which is simply a group of ASCII characters enclosed by a double quote For example this is a quoted string Symbol Meaning lt QString gt Quoted string value Table 3 5 Quoted String Argument Type Follow these rules when you use quoted strings e A quoted string can include any character defined in the 7 bit ASCII character set e Strings can have upper or lower case characters Astring cannot be terminated with the END message before the closing delimiter The maximum length of a quoted string returned from a query is 256 characters Block Arguments Some transducer commands use a block argument form Symbol Meaning NZDig a non zero digit character
14. quence E rst Chapter 4 Command Reference 23 OFFSET SET Syntax Parameters Remarks Example SPAN SET Syntax Parameters Remarks Example Sets or returns the value for the input offset OFFSET SET offset OFFSET SET gt OFFSET SET D as Space Qd value offset Real numeric value This signed value will be added to the digital output prior to displaying it Input offset will also affect the analog output Input offset value is always in PSI offset set 3 4 offset set 3 40 Sets or returns the value for the span SPAN SET span SPAN SET OCE Space He value span Real numeric value from 0 150 interval The pressure transducer s span will be set to the span of the original value Default value is 100 span set 101 Ifthe pressure transducer has 0 5 V output at 0 100 PSIG after setting span 101 analog output will be 0 5 05 V at 0 100 PSIG Digital output will be 0 101 PSIG span set 101 00 24 RS 232 Transducer Digital Communication User s Manual TURNDOWN SET Syntax Parameters Remarks Example TIMER SET Sets or returns the value for the turndown TURNDOWN SET turndown TURNDOWN SET TURNDOWN Y gt gt SET 20 D as Space H value turndown Real numeric value from 1 100 interval The pressure transducer s pressure range will be set to the turndown of the or
15. s Board temperature Temperature measurement is the RTD temperature if there is one present otherwise it is the temperature from the on chip temperature sensor Board temperature is the temperature from the on chip temperature sensor expressed in degrees Celcius test inp5 11775507 41600 34 5 Sets analog voltage output corresponding to a given count Syntax TEST OUTPV count Parameters TEST C OUTPV gt gt Space e cout gt count Possible values 0 4095 Chapter 4 Command Reference 21 The count is a value which will be send to the digital to analog converter to set the analog output Remarks This command is used to calibrate a transducer s analog output during the factory calibration process Example test outpv 2768 22 RS 232 Transducer Digital Communication User s Manual System Commands SYST VERS Syntax Example IDN Syntax Example RST Syntax Remarks Example System commands includes those relating to identification resetting the unit setting a timer FIRM Returns the firmware version SYST VERS FIRM CT gt O VERS OCN OO syst vers firm 217928G Returns the transducer part number serial number and a revision IDN CO idn STELLAR TECHNOLOGY INC IT2000 15A 101 007713 0 Resets the it2000 to power up status RST RT Executing this command is equivalent to executing a power up se
16. ure Transducer and start using it s basic functionality Contents Basic Measurements 2 ccccceessseccceesssseccceeesssseececessseeeeeseessnes 10 10 RS 232 Transducer Digital Communication User s Manual Basic Measurements To make basic digital pressure or temperature measurements you may use the standard Windows Terminal program with appropriate settings Steps required to make one digital pressure measurement using the Terminal program 1 Run Terminal program 2 Set communication port settings 3 Type in the command meas pres terminated with the command terminator see Chapter 3 Using Commands 4 An example of a RS 232 Transducer response is shown below it4000 Terminal HyperTerminal Iof x File Edit View Call Transfer Help Die als cls meas pres 14 6169 PSI T wo e FZ Connected 0 00 19 ANSI 8600 8 N 1 Figure 2 1 Windows Terminal program For more commands see Chapter 4 Command Reference CHAPTER 3 Using Commands The RS 232 Transducer is controlled through the RS 232 interface using a large group of commands and queries This chapter describes the syntax these commands and queries use and the conventions the transducer uses to process them The commands and queries themselves are listed in Chapter 4 Command Reference Contents e Command and Query Structure esser 16 Command EDtry iiiie ettet tet
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