Installation manual

Series C Controller Configuration and Operation Manual
14-6  Athena Controls, Inc. 900M050U00
14.5 Configuring Serial Communications Parameters for
MODBUS
14.5.1 Introduction
The items that appear on the SerLSerL (serial) menu in controllers that support MODBUS are
different from the SerLSerL menu items displayed if the controller supports Athena Plus
Protocol. The MODBUS communication parameters presented briefly below are
described in more detail in Using the MODBUS Protocol with Athena Series C (1ZC, 16C,
18C, and 25C) Controllers. We recommend that you consult that manual before setting
up your MODBUS network and configuring these communication parameters.
14.5.2 Assigning a Unique Controller Address When MODBUS is Used
Parameter Name
: Controller ID Number (D5)
Name as Displayed:
Id.noId.no
Used By:
all except 1ZC (See Note 1 below.)
When Displayed:
if the card type is serial
Range:
1 to 247
Default:
1
Description:
Used to assign a unique address to each controller on the
MODBUS network.
Note 1: The address for a 1ZC controller is set using DIP switches as described in the
manual provided with the controller.
14.5.3 Selecting the Baud Rate Applicable to MODBUS Communications
Parameter Name
: Baud Rate (D6)
Name as Displayed
:
baUdbaUd
Used By:
all
When Displayed:
if the card type is serial
Choices:
300
600
1200
2400
4800
9600
Default:
9600 (MODBUS only)
Description:
Used to select the baud rate.