Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 250)

Publication AG-UM008C-EN-P - February 2005
7-24 Configuring Logix Controllers
DF1 Point-to-Point
Diagnostic Counters DF1 Point-to-Point driver status data is stored in the Diagnostic
Counter attribute of the DF1 communication object. You must define a
controller tag to be the destination for this data and copy the system
data to this tag using a GSV instruction. For the required ladder logic,
see page 7-25.
1. To bring up the Controller Tag
interface, click on the Controller Tags
icon.
2. For details of the
DisgnosticCounter
files, see Table 7.9.
Table 7.9 DF1 Full-Duplex (Point-to-Point) Diagnostic Counters
Status Field Diagnostic Tag Array
Location Definition
signature (67
10
) word 0 DF1 Point-to-Point is the configured protocol
DTR (Data Terminal Ready) word 1;bit 4 The status of the DTR handshaking line (asserted by the controller)
DCD (Data Carrier Detect) word 1;bit 3 The status of the DCD handshaking line (received by the controller)
DSR (Data Set Ready) word 1;bit 2 The status of the DSR handshaking line (received by the controller)
RTS (Request to Send) word 1;bit 1 The status of the RTS handshaking line (asserted by the controller)
CTS (Clear to Send) word 1;bit 0 The status of the CTS handshaking line (received by the controller)
packets sent word 2 The total number of DF1 packets sent by the controller (including
message retries)
packets received word 3 The number of packets received with no errors
undelivered packets word 4 The number of packets that were sent by the controller but not
acknowledged by the destination device
unused word 5