User guide

Communication Capabiliites

890 USE 108 00 August 2001

Modbus Plus Communications E984-265/275/285

10-Position

Rotary Switches-

Node

Addressing

Each node on a Modbus Plus network must have a unique address from 1-64 using

the two rotary switches on the front of the E984-265/275/285 bezel.

Two rotary switches are used for setting Modbus Plus node and Modbus port 1

addresses. SW1 (the top switch) sets the upper digit (tens) of the address; SW2 (the

bottom switch) sets the lower digit (ones) of the address.

The following figure shows the correct setting for example address 11.

The following table lists the SW1 and SW2 address settings.

Node Address SW1 X10 SW2 X1

1 ... 9 0 1 ... 9

10 ... 19 1 0 ... 9

20 ... 29 2 0 ... 9

30 ... 39 3 0 ... 9

40 ... 49 4 0 ... 9

50 ... 59 5 0 ... 9

60 ... 64 6 0 ... 4

Note: If "0" or an address greater than 64 is selected, the Modbus Plus LED

remains on steady to indicate that an invalid address was selected.

SW1 (Top)

SW2 (Bottom)