Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 99)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-31
For the MicroLogix 1500 LRP, 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.
Configuring the Store & Forward Table
The Store & Forward Table occupies a 16-word binary data table file.
Each bit in this file corresponds to a DF1 Radio Modem node address.
In order to configure a MicroLogix to Store & Forward message
packets between two other nodes, the bits corresponding to the
addresses of those two other nodes must be set. For instance, if node
2 is used to Store & Forward message packets between nodes 1 and 3,
then both bits Bx/1 and Bx/3 would have to be set in the Store &
Forward Table (see Figure 3.6). You can set bit 255 to enable Store &
Forward of broadcast packets, as well.
Duplicate Messages
Received CSx:18 The number of times the processor received a message packet identical
to the previous message packet
Bad Packets Received CSx:16 The number of data packets received with transmission errors by the
processor
RTS (Request to Send) CSx:9/1 The status of the RTS handshaking line (asserted by the processor)
CTS (Clear to Send) CSx:9/0 The status of the CTS handshaking line (received by the processor)
DCD (Data Carrier Detect)
(1) CSx:9/3 The status of the DCD handshaking line (received by the processor)
(1) Only present on the MicroLogix 1500 LRP channel 1.
(2) The channel number equals x.
Table 3.8 Understanding the DF1 Radio Modem Channel Status
Status Field Communication Status
Function File Location
(2)
Definition
IMPORTANT
Once Store & Forward is enabled, duplicate packet
detection is also automatically enabled. Whenever
Store & Forward is used within a radio modem
network, every node should have Store & Forward
enabled, even if all of the bits in the file are cleared,
so that duplicate packets will be ignored.