Serial Line Configuration

Introduction

The Serial Line configuration window allows you to configure the physical parameters of a serial line (baud rate, parity, and so on).

Serial Line Configuration

To configure a Serial Line, double-click Serial line in the Devices tree.

The following parameters must be identical for each serial device connected to the port.

Element

Description

Baud rate

Transmission speed in bits/s

Parity

Used for error detection

Data bits

Number of bits for transmitting data

Stop bits

Number of stop bits

Physical Medium

Specify the medium to use:

  • RS485 (using polarisation resistor or not)

  • RS232

Polarization Resistor

Polarization resistors are integrated in the controller. They are switched on or off by this parameter.

The serial line ports of your controller are configured for the Machine Expert protocol by default when new or when you update the controller firmware. The Machine Expert protocol is incompatible with that of other protocols such as Modbus Serial Line. Connecting a new controller to, or updating the firmware of a controller connected to, an active Modbus configured serial line can cause the other devices on the serial line to stop communicating. Make sure that the controller is not connected to an active Modbus serial line network before first downloading a valid application having the concerned port or ports properly configured for the intended protocol.

NOTICE
INTERRUPTION OF SERIAL LINE COMMUNICATIONS
Be sure that your application has the serial line ports properly configured for Modbus before physically connecting the controller to an operational Modbus Serial Line network.
Failure to follow these instructions can result in equipment damage.

This table indicates the maximum baud rate value of the managers:

Manager

Maximum Baud Rate (Bits/S)

Machine Expert Network Manager

115200

Modbus Manager

ASCII Manager

Modbus IOScanner

Serial Line Diagnostic Table

To access the Serial Line Diagnostic Table, double click the Serial Line node in the Tools tree tab. Diagnostic information are accessible with the structure SERDIAG_W_STRUCT. For more information, refer to Modicon M262 Logic/Motion Controller – System Functions and Variables – System Library Guide.