Omega A2400 manual Transparent Mode

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Transparent Mode 10-5

Example 4. A2400 interfacing several instruments with a string of modules.

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Contents User’sGuide For immediate technical or application assistance Servicing North AmericaServicing Europe Revised 4/17/95 Omega Engineering ONE Omega DriveBOX 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 A2400 Operation RS-485 TerminationCharacter Filter 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 StructureData Structure Write ProtectionMiscellaneous Protocol Notes Response StructureCommand Checksum Long Form Responses?1 BAD Checksum ?1 Syntax Error$1WEF A2400 User Commands A2400 Command Set RT3Command Descriptions Command 01CC Response Response *01CC11 Digital Output doCommand $1DO01 Response Command #1DO01 Response *1DO014F Closed Channel CC ExtendedCommand $1DO00 Response Command #1DO00 Response *1DO004E Extended Address EA#1ID Tank Farm $1ID Tank Farm1ID Tank Farm 1CD Open Channel OC Extended Command 01OC Response Response *01OCEDRead Data RD $1RID Tank Farm#1RID 1RID Tank Farm 11F$1RSU #1RSU$1RSP #1RSPResponse *1RT1+00100.00DC Read Time Delay 2 RT2 Read Time Delay 1 RT1Response *+00100.00 Page Page Short Prompt SP Command 01WE Response *01WE27 Error MessagesAddress Error BAD ChecksumCommand Error Parity ErrorSyntax Error Value ErrorCommand Syntax Chapter Setup Information/SetUp Command$1SUbyte 1byte 2byte 3byte Byte Byte 1 Ascii Printable Characters HEX AsciiParity Baud RateCommand $1WE Response Command $1SU31020000 Command $1RS Response *31070000Command $1RS Response *31020102 Command $1WE Command $1RR Response BitByte 2 Linefeed, Parity and Baud Rate 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-232 Module is not responding to commands Chapter TroubleshootingSymptom RS-485 Module is not responding to commands Open/Close Channel Commands Command 01WE ResponseChapter Extended Addressing Typical system overview Command 01OC Response Command $1RD Response +00100.00 Typical $2RD +00123.45Command 01CC Response Command 02OC ResponseStructured Addressing Extended Address SyntaxOC and CC Command Formats Implied CC CommandImplied OC Command Command ResponseCommand 01$1RD Response *+00100.00 Command Response *01OC1D Single Command Module AddressExplicit Open and Close Channel Commands 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