Omega manual A2400 networking several RS-232 devices to a host computer

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Transparent Mode 10-3

Example 2. A2400 networking several RS-232 devices to a host com- puter.

Figure 10.2 A2400 networking several RS-232 devices to a host computer.

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Contents User’sGuide Servicing Europe Servicing North AmericaFor immediate technical or application assistance BOX Revised 4/17/95Omega Engineering ONE Omega Drive STAMFORD, CT Phone 1-800-DAS-IEEETable of Contents Chapter Getting Started IntroductionSystem Overview Leased Lines$1RD +99999.99Default Mode Page Block Diagram Chapter Functional DescriptionFunctional Description Pinout Character Filter RS-485 TerminationA2400 Operation Page Programmable Delay Times Page Command $1RD Response *+99999.99 Chapter CommunicationsDO, OC, CC, RD, REA, RID, RLP, RS, RSP, RSU Communication RS-485 Multidrop System DATA+Page Chapter A2400 Command Set Command StructureMiscellaneous Protocol Notes Data StructureWrite Protection Response StructureCommand Checksum Long Form Responses$1WEF ?1 Syntax Error?1 BAD Checksum A2400 User Commands A2400 Command Set RT3Command $1DO01 Response Command #1DO01 Response *1DO014F Command DescriptionsCommand 01CC Response Response *01CC11 Digital Output do Closed Channel CC ExtendedCommand $1DO00 Response Command #1DO00 Response *1DO004E Extended Address EA1ID Tank Farm 1CD $1ID Tank Farm#1ID Tank Farm Read Data RD Command 01OC Response Response *01OCEDOpen Channel OC Extended #1RID $1RIDTank Farm 1RID Tank Farm 11F$1RSP $1RSU#1RSU #1RSPResponse *+00100.00 Read Time Delay 1 RT1Response *1RT1+00100.00DC Read Time Delay 2 RT2 Page Page Short Prompt SP Address Error Command 01WE Response *01WE27Error Messages BAD ChecksumSyntax Error Command ErrorParity Error Value Error$1SUbyte 1byte 2byte 3byte Chapter Setup Information/SetUp CommandCommand Syntax Byte Byte 1 Ascii Printable Characters HEX AsciiParity Baud RateCommand $1RS Response *31020102 Command $1WE Command $1RS Response *31070000Command $1WE Response Command $1SU31020000 Byte 2 Linefeed, Parity and Baud Rate Command $1RR ResponseBit BaudNormal addressing Chapter Delay Time Programming Delay Time Programming Page Command $1T3+00050.00 Set T3 to 50 ms Response Command $1RT1 Response *+00100.00Chapter Power Supply Symptom RS-485 Module is not responding to commands Chapter TroubleshootingSymptom RS-232 Module is not responding to commands Chapter Extended Addressing Command 01WE ResponseOpen/Close Channel Commands Typical system overview Command 01CC Response Command 01OC ResponseCommand $1RD Response +00100.00 Typical $2RD +00123.45 Command 02OC ResponseStructured Addressing Extended Address SyntaxImplied OC Command OC and CC Command FormatsImplied CC Command Command ResponseExplicit Open and Close Channel Commands Command Response *01OC1D Single Command Module AddressCommand 01$1RD Response *+00100.00 Command 01CC Response 01CC11 ‘11’ is the checksum Command 02OC Response 02OC1E ‘1E’ is the checksumChapter Transparent Mode Transparent Mode FunctionsA2400 interfacing a PLC to a leased-line modem A2400 networking several RS-232 devices to a host computer A2400 interfacing a laboratory instrument with modules Transparent Mode Adding secondary control using A2400 modules Transparent Mode WARRANTY/DISCLAIMER Shop online at omega.com