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5–8
When using a 1785-KE in this application, it should be set for Remote
mode by setting the Remote/Local option switch (refer to Chapter 3).
When in Remote mode, the Series B 1785-KE module allows any PLC on
one of the Data Highway Plus networks to talk to any PLC on the other
Data Highway Plus network. This is made possible because the Series B
module supports the Data Highway Plus remote addressing capability.
With remote addressing, the local 1785-KE (node address 013 on Data
Highway Plus #1) can be addressed separately from the final destination
PLC-5 (node address 012 on Data Highway #2). There are no additional
restrictions on what the addresses can be when using the Series B 1785-KE
to connect two Data Highway Plus networks.
In the following examples, we send PLC-5 read and write commands from
a PLC-5 on Data Highway Plus #1 (node address 010) to a PLC-5 on Data
Highway Plus #2 (node address 012).
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This example message instruction writes eight words from the local PLC-5
(node 010) integer file 7, word locations 0 through 7, to the remote PLC-5
(node 012) integer file 7, word locations 0 to 7.
Program a message (MSG) instruction with the parameters shown below.
Also, you must set up the message instruction for continuous mode by
toggling bit N 10:20/11 to ON.
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