Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario descargar pdf (Pagina 188)

Message Formats

Appendix A

A26

Diagnostic Read

You use this command to read up to 244 bytes of data from the PROM or

RAM of the station interface module. You can use it to read the module’s

diagnostic timers and counters. Use the diagnostic status command to

obtain the starting address of the diagnostic counters.

Command Format:

FNC

DLE

SRC

STX DST C

TNS

DLE ETX

BCC

SIZEADDR

Reply Format:

DLE

TNS

STX

DLE ETX

BCC

DATA - Max of 244 bytes

DST

SRC

Diagnostic Status

You use this command to read a block of status information from the

station interface module. The reply to this command contains the status

information in its DATA field.

Command Format:

FNC

DLE

SRC

STX DST C

TNS

DLE ETX

BCC

Reply Format:

DLE

TNS

STX

DLE ETX

BCC

DATA - Max of 244 bytes

DST

SRC

The status information varies with the type of station interface module.

Table A.B describes this status DATA for 1775–KA modules.

1 2 ... 183 184 185 186 187 188 189 190 191 192 193 ... 238 239

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Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manual de usuario Pagina 188

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