Chapter 3: Modicon PLCs Using Modibus Plus
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Communication Parameters
When using the Modbus Plus interface board, the only communication parameter that needs to be set
is the I/O port. In the PLC Name and Port Table, configure the Use field for the I/O port to
.
Configuration Entries
A sample PLC Name and Port Table is shown below.
In the PLC Name Table, under the ID# field, the routing address(es) must be specified. The Operator
Station can communicate through a maximum of four bridges. When entering routing information,
each bridge address is followed by a command. The last routing address represents the ID# of the
controller the Operator Station will be communicating with.
Sample Addressing for Configuration
[PLC8,40055]
Register 40055 of Controller 19 Network #4
[PLC4, 30125] Register 30125 of Controller 12 Network #2
[GLBL, G0030] Operator Station Global Register 30
[90030.01] Coil 16 of Global Register 30 of Controller 6 Network #1
[PLC7,00055]
Coil 00055 of Controller 15 Network #4
[10077] Contact 10077 of Controller 6 Network #1
