Installation manual

Publication 1747-RM001G-EN-P - November 2008
13-54 SLC Communication Channels
Table 13.16 SLC 5/03 and Higher Channel 0 DF1 Full-duplex Channel Status
For processors running OS Series C, FRN 6 and higher, clicking the Clear
button while monitoring Channel Status of either channel 1 or channel 0
online, will reset all of the channel status diagnostic counters for both channels
to zero. Prior to OS Series C, FRN 6 the only channel status diagnostic
counters that are reset when the Clear button is clicked are the ones on the
channel that the programming terminal is connected to. For example, if your
programming terminal is connected online via channel 0 and you are
monitoring the Channel Status of channel 1, when you click on the Clear
button, only channel 0 diagnostic counters will be reset, not channel 1
diagnostic counters.
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 ENQs 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
Inquiry Sent word 4 The number of ENQs sent by the processor
Bad Packet/No ACK word 7 The number of incorrect data packets received by the processor for which
a NAK 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 (Data Carrier Detect) word 0;bit 3 The status of the DCD handshaking line (received by the processor)