Rockwell Automation 1785-CHBM ControlNet PLC-5 Hot Backup System User Manual - Manual (Page 39)

Publication 1785-UM024B-EN-P - January 2003
Installing and Configuring Your ControlNet PLC-5 Backup System 3-13
The Connection Properties dialog box appears.
The To Node field is already filled in for you. This number
indicates the node number from which you will receive the
Consume Buffer ID scheduled message. In your ControlNet
backup system, the odd-numbered node will receive the
message from the even node, and vice versa.
2. Double click under the Value field to select the message number
you wish to assign to identify this message.
Note that the message number for the Consume Buffer ID
message must match the message number of the corresponding
Produce Buffer ID message. The node number and message
number are used together to identify the specific message.
3. In the Requested Packet Interval field, enter an RPI value for
this message from 1 to 32,767. (For purposes of this example,
we will use an RPI value of 5ms.)
In general, the RPI value must be no less than the NUT value,
but less than 2 times the NUT value. This value must be the
same in both PLC-5s.
4. In the Input Size field, enter a value of 5 and click OK.
The Consume Buffer ID scheduled message is inserted in your
ControlNet Configuration for the odd-numbered node. The
corresponding Produce Buffer ID scheduled message is
automatically inserted for the even-numbered node.
5. From the main RSNetWorx for ControlNet screen, right click
on the second PLC-5 and choose Scanlist Configuration.