Schneider Automation Modicon Quantum Ethernet Guide de l'utilisateur télécharger pdf (Page 181)

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101

CPU Modules

35013379 02 October 2007 181

Front Panel Slide

Switch

The slide switch is used to select the comm parameter settings for the Modbus

(RS232) ports. Three options 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 figure shows the three options that are available on the front panel slide switch.

The following table shows the ASCII comm port parameters.

The following table shows the RTU comm port parameters. The comm 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 Comm Port Parameters

Baud 2,400

Parity Even

Data Bits 7

Stop Bits 1

Device Address Rear panel rotary switch setting

RTU Comm Port Parameters

Baud 9,600

Parity Even

Data Bits 8

Stop Bits 1

Device Address Rear panel rotary switch setting

RTU

mem

ASCII

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

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