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3 slave configuration – ProSoft Technology MVI56E-MCMR User Manual

Page 86

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Configuring the MVI56E-MCMR Module

MVI56E-MCMR ♦ ControlLogix Platform

User Manual

Modbus Communication Module with Reduced Data Block

Page 86 of 225

ProSoft Technology, Inc.

May 13, 2014

2.4.3 Slave Configuration

Value

Description

Enabled

1

= enable port, 0 = disable port

Type

1 = Modbus Slave Port

Protocol

0 = Modbus RTU mode, 1 = Modbus ASCII mode

Baud Rate

Sets the baud rate for the port. Valid values for this field are 110, 150,
300, 600, 1200, 2400, 4800, 9600, 19200, 384 or 3840 (for 38,400
baud), 576 or 5760 (for 57,600 baud) and 115,1152, or 11520 (for
115,200 baud)

Parity

0 = None, 1 = Odd, 2 = Even

Data Bits

8 = Modbus RTU mode, 8 or 7 = Modbus ASCII mode

Stop Bits

Valid values are 1 or 2

RTS On

0 to 65535 milliseconds to delay after RTS line is asserted on the port
before data message transmission begins. This delay can be used to
allow for radio keying or modem dialing before data transmission
begins.

RTS Off

0 to 65535 milliseconds to delay after data message is complete
before RTS line is dropped on the port.

Use CTS Line

N

O

or Y

ES

This parameter is used to enable or disable hardware handshaking.
The default setting is N

O

hardware handshaking, CTS Line not used.

Set to N

O

if the connected devices do not need hardware

handshaking. Set to Y

ES

if the device(s) connected to the port require

hardware handshaking (most modern devices do not). If you set this
parameter to Y

ES

, be sure to pay attention to the pinout and wiring

requirements to ensure that the hardware handshaking signal lines
are properly connected; otherwise communication will fail.

Float Flag

As a Slave, emulates Enron/Daniel style floats. See Floating Point
Data Handling for more information (page 87).