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Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM User Manual

Page 57

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Publication AG-UM008C-EN-P - February 2005

Configuring Enhanced PLC-5 Processors 2-19

Undelivered Messages

word 3

The number of messages that were sent by the processor but not
acknowledged by the destination device

Duplicate Messages
Received

word 9

The number of times the processor received a message packet identical
to the previous message packet

Bad Packet/No ACK

word 7

The number of incorrect data packets received by the processor for
which a no ACK was returned

DTR (Data Terminal Ready)

word 0;bit 4

The status of the DTR handshaking line (asserted by the processor)

DSR (Data Set Ready)

word 0;bit 2

The status of the DSR handshaking line (received by the processor)

RTS (Request to Send)

word 0;bit 1

The status of the RTS handshaking line (asserted by the processor)

CTS (Clear to Send)

word 0;bit 0

The status of the CTS handshaking line (received by the processor)

DCD (Carrier Detect)

word 0;bit 3

The status of the DCD handshaking line (received by the processor)

Status Field

Diagnostic File Location

Definition