Omega A2400 manual $1RID, #1RID, 1RID Tank Farm 11F, $1RLP, #1RLP, 1RLP7DC4

Page 32

Command Set 4-11

In this example the ‘30’ and ‘31’ are the hex ASCII codes for the characters ‘0’ and ‘1’ respectively. The Extended Address is ‘01’.

Read Identification (RID)

The Read IDentification command reads back the user data stored by the IDentification (ID) command. The ID and RID commands are provided as a convenience to the user to store up to 16 characters of information in the A2400 EEPROM. The stored information could be anything from the date of installation to a device tag indicating where the device is positioned in a system.

Command:

$1RID

Response:

* TANK FARM 1

Command:

#1RID

Response:

*1RID TANK FARM 11F

Read Long Prompt(RLP)

The Read Long Prompt command reads back the extended addressing long form command prompt stored in the module’s nonvolatile memory with the Long Prompt (LP) command. The response to the RLP command is a two character hex value of the ASCII long form prompt character.

Command:

$1RLP

 

Response:

*7D

(7D = } = Factory Setup)

Command:

#1RLP

 

Response:

*1RLP7DC4

 

Remote Reset (RR)

The Remote Reset (RR) command allows the host computer to perform a program reset on the module’s microprocessor. This may be necessary if the module’s internal program is disrupted by static or other electrical disturbances. Once a reset command is received, the A2400 will read the setup information and delay values from EEPROM and activate the read values.

Command: $1RR

Response: *

Image 32
Contents User’sGuide Servicing Europe Servicing North AmericaFor immediate technical or application assistance 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 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 StructureData Structure Write ProtectionMiscellaneous Protocol Notes Response StructureCommand Checksum Long Form Responses$1WEF ?1 Syntax Error?1 BAD Checksum 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 EA1ID Tank Farm 1CD $1ID Tank Farm#1ID Tank Farm Read Data RD Command 01OC Response Response *01OCEDOpen Channel OC Extended $1RID Tank Farm#1RID 1RID Tank Farm 11F$1RSU #1RSU$1RSP #1RSPResponse *+00100.00 Read Time Delay 1 RT1Response *1RT1+00100.00DC Read Time Delay 2 RT2 Page Page Short Prompt SP Command 01WE Response *01WE27 Error MessagesAddress Error BAD ChecksumCommand Error Parity ErrorSyntax 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 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-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 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 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