Schneider Automation Modicon Quantum Ethernet Betriebsanweisung PDF herunterladen (Seite 123)

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CPU Modules

35013379 02 October 2007 123

Front Panel

Switches

Two, three-position slide switches are located on the front of the CPU. The left

switch is used for memory protection when in the top position and no memory

protection in the middle and bottom positions. The three-position slide switch on the

right is used to select the communication parameter settings for the Modbus

(RS-232) ports.

The following figure shows the three options that are available for the CPU11302.

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

memnot used

off

mem

prt

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

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