Operation

RS 485 Port Configuration (Communication Board Option)

RS 485 Port Configuration (Communication Board Option)

COMM A and B ports

UMC controllers equipped with the optional communications board feature two RS 485 serial communications ports (COMM A and COMM B) on the CPU module. See Figure 31 for location of the port connectors. See Wiring Communications links, Page(36) for more details on the port wiring. The controller firmware supports Modbus RTU protocol for the ports.

The COMM A and COMM B ports must be set up so that the controller can communicate when connected to a communication link. Set up is accomplished through the operator interface or the user utility software program. The Communications screen in the operator interface for COMM A is used to enable the port, set the device (station) address of the controller and set the baud rate. The COMM B screen is used to set the baud rate. See UMC800 Operator Interface User Guide for details on communications port setup. See UMC800 User Utility User’s Guide and the on-line help for more details on setting up the COMM ports.

COMM port status

COMM A status can be checked through the COMMUNICATIONS menu item on the operator interface. COMM B status can be monitored with the User Utility. Slave device statuses can be viewed after loading a configuration into User Utility via upload or floppy disk. Slave devices must first be enabled through the operator interface COMMUNICATIONS menu item or the User Utility.

CPU Module with Optional Communications Board

Re plac e ba ttery wit h Ta di ra n TL510 1/S

RUN

on ly. Us e of ano ther ba ttery ma y pre se nt a risk of fire or ex pl osi on . See use rs g uide f or i ns tr uct ions .

BAT

DISPL AY

_

100 - 24 0 V ~

50 / 6 0 Hz

100 VA MAX.

COMM A

 

Port

A

COMM B

COM M

 

Port

B

 

COMM

F 3,15 A T 250V

L1

L2 / N

COMM A and B shown with 2-wire connections. See Wiring Communications links, Page(36) for 4-wire details.

Figure 31 COMM A and B ports on CPU module

Release F

UMC800 Controller Installation and User Guide

61

4/01

 

 

Page 69
Image 69
Honeywell UMC800 manual RS 485 Port Configuration Communication Board Option, Comm a and B ports, Comm port status