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128 UDC 6300 Process Controller Product Manual 1/03

4.14 Communications Set Up Group

Introduction

This option allows the controller to be connected to a host computer by

way of various communications options.

The controller looks for messages from the computer at regular intervals.

If these messages are not received within the configured shed time, the

controller will SHED from the communications link and return to stand

alone operation.

The device address, parity, baud rate, Computer Setpoint, Units, Ratio,

and Bias are configurable depending on the protocol you are using.

You can also set the SHED output mode and setpoint recall, and

communication units.

Up to 99 addresses can be configured over this link.

485TDC option

Up to four RS485 link addresses are allowed when the communication

option is selected as 485TDCSDI. One PV Point and one OP point are

required to be configured per loop when the UDC6300 TDC integration

schematics are to be used for Operator Interface from the TDC Universal

Station. Remote Cascade Option and overall mode of Operation can also

be configured.

Communications group

prompts

Table 4-13 lists all the function prompts in the Communications setup

group and their definitions.

Table 4-13 Communications Group Definitions

Lower Display

Prompt

Upper Display

Range of Setting

or Selection

Parameter

Definition

COM STATE

DISABL

485DMCS

422ASCII

485MODRTU

485TDCSDI

485BSAP

COMMUNICATIONS SELECTION

DISABL

— Disables the communications option.

DMCS — Enables DMCS communication.

422ASCII — Enables RS422/485 communication.

485RTU — Enables Modbus 485RTU communication.

485TDC — Allows the UDC6300 to communicate with the

TDC3000.

485BSAP — Bristol Protocol

ADDRESS

485DMCS, 422ASCII,

485MODRTU, 485BSAP

only

1 to 99

COMMUNICATIONS STATION ADDRESS (LOOP 1) —

This is a number that is assigned to a controller that is to

be used with the communications option. This number will

be its address. Must be different addresses for 2 Loops on

485ASCII.

ADDRESS2

485ASCII only

1 to 99

COMMUNICATIONS STATION ADDRESS (LOOP 2) —

This is a number that is assigned to a controller that is to

be used with the communications option. This number will

be its address. Must be different addresses for 2 Loops on

485ASCII.

Table 4-13 continued on next page

1 2 ... 137 138 139 140 141 142 143 144 145 146 147 ... 301 302

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