Momentum Modbus Plus 170 PNT Series Guia do Utilizador Página 77

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Overview of Momentum Option Adapters
870USE10110 July 2004 77
Modbus Plus
Address
Switches
The two rotary switches on the option adapter are used to set a Modbus Plus node
address for the CPU module. The switches are shown in the following illustration.
Their usage is described in detail on p. 144.
The switches in this illustration are set to address 14.
Modbus Plus
Ports A and B
This option adapter has two Modbus Plus ports. Redundant cabling on the Modbus
Plus network offers increased protection against cable faults or excessive noise
bursts on either one of the two cable paths. When one of the channels experiences
communication problems, error-free messaging can continue to be processed on
the alternate path.
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
X10
X1
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