3.18Communications Set Up Group

Introduction

Function prompts

This data deals with the Communications option that is available with your controller. This option allows the controller to be connected to a host computer via an RS422/485 or Modbus protocol.

If your controller does not have this option the prompts will not appear.

Table 3-15 lists all the function prompts in the Communications Set Up group.

Table 3-15 Communications Group Function Prompts

Function Prompt

Lower Display

ComSTATE

Function

Name

Communications Option State

Selections or

Range of Setting

Upper Display

DISABL

MOD3K

MODBUS

RS422

Factory Setting

DISABL

Refer

to

Section

4.14

Com ADDR

ComADDR2

SHEDENAB

SHEDTIME

PARITY

BAUD

Communications Station Address

Loop 2 Communications Station Address

Shed Enable

Shed Time

Parity

Baud Rate

1 to 99

1 to 99

When ComSTATE = MODBUS, ComADDR2 = Com ADDR

DISABL

ENABL

0 to 255 sample periods

(1 sample period = 0.333 seconds) 0 = No Shed

ODD

EVEN

Fixed at NONE when ComSTATE =

MODBUS

2400

4800

9600

19200

0

0

DISABL

0

ODD

2400

DUPLEX

Duplex Operation

HALF

FULL

ATTENTION

When ComSTATE = MODBUS, this selection is fixed at HALF.

When the RS422/485/Auxiliary output option board is installed, this selection is fixed at HALF.

HALF

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Honeywell UDC 3300 manual Communications Set Up Group, Communications Group Function Prompts, Shedenab Shedtime Parity Baud