Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 60)

Publication AG-UM008C-EN-P - February 2005
2-22 Configuring Enhanced PLC-5 Processors
Displaying Point-to-Point System Channel Status
Table 2.7 Descriptions of System (Point-to-Point) Channel Status Fields
1. To display Channel Status,
double-click on Channel
Status, which is located
within Channel Configuration.
2. To access the various channels
from the Channel Status
screen, click on the tabs.
Descriptions of the status
screen fields can be found in
Table 2.7.
Status Field Diagnostic File Location Definition
DCD Recover word 11 The number of times the processor detects the DCD handshaking line has
gone low to high
Messages Sent word 1 The total number of DF1 messages sent by the processor (including
message retries)
Messages Received word 2 The number of messages received with no errors
Inquiry Received word 6 The number of master poll packets received by the processor
Received NAK word 5 The number of NAKs received by the processor
Lack of Memory/Sent NAK word 8 The number of times the processor could not receive a message because
it did not have available memory
Lost Modem word 12 The number of times the lost modem bit has gone low to high
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