Specifications

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Schneider Electric

Presentation

Quantum automation platform 4

Momentum Modbus Plus Communication Adapters

Modbus Plus Communication Adapters for the Momentum I/O product line can be

plugged into any Momentum I/O base to create a functional I/O unit on the Modbus

Plus bus, and to provide a direct connection to the Modbus Plus Network for the full

family of Momentum I/O modules. This connectivity enables communications with all

of the Modbus Plus compatible control products - including programmable

controllers, industrial computers, operator control stations, drive systems, and other

controls - to provide a flexible, cost-effective solution for distributing I/O modules

throughout a large area. To expand the capabilities of the Modbus Plus Network for

distributed I/O applications, the communication adapters have been designed to

permit up to 64 Momentum I/O modules to be connected to the network without the

need for signal repeaters.

Each Momentum I/O module is an individual node on the Modbus Plus network with its

address user-selected on the dual rotary switch on the front of the communication

adapter. The Momentum I/O modules can be configured for the network, and

assigned program reference numbers, by using either the Peer Cop function or the

MSTR function block instruction in the programmable controller or the Modbus Plus

configuration in an industrial computer.

There are four types of Communication Adapters available :

b 170 PNT 110 20, Single Port, IEC Data Format.

b 170 PNT 160 20, Redundant Port, IEC Data Format.

b 170 NEF 110 21, Single Port, 984 Data Format.

b 170 NEF 160 21, Redundant Port, 984 Data Format.

This version of the Momentum Modbus Plus Communication Adapter communicates

I/O data to the programmable controller in the IEC data format, which has bit

numbering 0 through 15, right to left, within the data word (i.e., input or output number

1 is bit number 0).

This version of the Momentum Modbus Plus Communication Adapter communicates

I/O data to the programmable controller in the traditional 984 data format, which has

bit numbering 1 through 16, left to right, within the register (i.e., input or output number

1 is bit number 1).

Since Modbus Plus is supported by the Quantum and 984 controller families,

Momentum I/O can be added to existing control systems where additional I/O

capacity or a distributed I/O sub-network is needed, because of requirements for the

control system. The figures below illustrate typical control systems using Momentum

I/O modules on the Modbus Plus network with programmable controllers and

industrial computer systems.

Presentation

IEC Data Format

984 Data Format

haracteristics :

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References :

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