Publication 1747-RM001G-EN-P - November 2008
13-74 SLC Communication Channels
DF1 Half-duplex Slave Channel Status
Channel Status data is stored in the diagnostic file defined on the Channel 0
Configuration screen. See Table 13.23 for information regarding the diagnostic
counter data displayed.
Double-click on the Channel Status
Icon Located beneath the
Configuration icon to bring up the
Channel Status screen.
See Table 13.23 for details concerning
the DF1 Half-Duplex Slave Channel
Status Screen.
Table 13.23 SLC 5/03 and Higher Channel 0 DF1 Half-duplex Slave Channel Status
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
Polling 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/No ACK
Sent
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
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