Schneider Automation Modicon Quantum Ethernet Guide de l'utilisateur télécharger pdf (Page 194)

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101

CPU Modules

194

35013379 02 October 2007

Front Panel Slide

Switch

The slide switch, located on the front panel of the CPU, is used to select the

communication parameter settings for the Modbus (RS-232) ports. Three positions

are available:

1. Setting the switch to the top position assigns ASCII functionality to the port.

2. Setting the switch to the middle position assigns remote terminal unit (RTU)

functionality to the port.

3. Setting the switch to the bottom position lets you assign comm parameters to the

port in software.

The slide switch:

Setting the slide switch to the top position assigns ASCII functionality to the port; the

following communication parameters are set and cannot be changed.

Setting the slide switch to the middle position assigns remote terminal unit (RTU)

functionality to the port; the following communication parameters are set and cannot

be changed.

Note: The CPU hardware defaults to bridge mode when the front panel switch is

set to RTU or ASCII mode. When networking controllers, a panel device connected

to the CPU Modbus port can communicate with the controller to which it is

connected, as well as log into any nodes on the Modbus Plus network.

ASCII Communication Port Parameters

Baud 2,400

Parity Even

Data Bits 7

Stop Bits 1

Device Address Rear panel rotary switch setting

RTU Communication Port Parameters

Baud 9,600

Parity Even

Data Bits 8

Stop Bits 1

Device Address Rear panel rotary switch setting

ASCII

RTU

mem

This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com

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