Allen-Bradley PLC-5 User Manual page 173

Status Field
DCD recover
Messages sent
Messages received
EOT received on first poll
Lost modem
Messages retried
Undelivered messages
Duplicate messages received
Bad packet/no ACK sent
Last poll list scan last
Last priority poll list scan last
Max normal poll list scan
Max priority poll list scan
ENQs received
ENQs sent
Received NAK
Lack of memory/sent NAK
Lack of memory/no ACK sent
Polling received
System Mode (DF1 Master) Status Screen
Descriptions of System Mode Status Screen Fields
Word Bit Description
11 Displays the number of times the controller detects the DCD-handshaking line has gone low to
high.
1 Displays the total number of DF1 messages sent by the controller (included message retry).
2 Displays the number of messages the controller received with no error.
8 Displays the number of times the master received an EOT in response to the first poll of a station.
12 Displays the number of times a modem was disconnected.
4 For slave and master mode, displays the number of messages resent.
3 Displays number of messages that were sent by controller but not received by the destination
device.
9 Displays the number of times the controller received a message packet identical to the previous
message packet.
7 Displays the number of incorrect data packets that the controller has received.
5 The time it took to complete the previous scan of the normal station poll list.
10 The time it took to complete the previous scan of the priority station poll list.
6 The maximum time taken to complete a scan of the normal station poll list.
13 The maximum time taken to complete a scan of the priority station poll list.
6 For point-to-point mode, displays the number of inquiries made by the destination device.
4 For point-to-point mode, displays the number of inquiries made by the controller.
5 For Point-to-point and slave mode, displays the number of NAK messages received by the
controller.
8 For point-to-point and slave mode, displays the number of times the controller could not receive
a message because it did not have enough memory.
6 For slave mode, displays number of times a DF1 master device has polled controller for a
message.
Communicating with Devices on a Serial Link
Publication 1785-UM012D-EN-P - July 2005
10-23