40 UDC3300 Limit Controller Product Manual 1/01
4.5 Communications Set Up Group
Introduction
This option allows the controller to be connected to a host computer via a
RS422/485 or DMCS bus. Fifteen units can be configured over this link.
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, and baud rate are
configurable.
ATTENTION
FM-approved Limit controllers with Communications
option are limited to READ ONLY (monitoring only) functionality.
Communications
group prompts
Table 4-4 lists all the function prompts in the “COMMUNICATIONS”
Set Up group and their definitions.
Table 4-4 Communications Group Definitions
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
ComSTATE
RS422
DMCS
DISABL
COMMUNICATIONS SELECTION
RS422—Allows RS422/485 communication prompts.
DMCS—Allows DMCS communication prompts.
DISABL—Disables the communications option.
Com ADDR
1 to 99 (RS422)
1 to 99 (DMCS)
COMMUNICATION STATION ADDRESS—This is a
number that is assigned to a controller that is to be used
with the communications option.
SHEDTIME
0 to 255 SHED TIME—The number that represents how many
sample periods there will be before the controller sheds
from communications. Each period equals 1/3 seconds or
0 = No shed.
PARITY
(RS422/485 only)
ODD
EVEN
PARITY pertains to the use of a self-checking code
employing binary digits in which the total number of ONE's
(or ZERO's) in each permissible code expression is either
ODD or EVEN.
ODD PARITY
EVEN PARITY
BAUD
(RS422/485 only)
300
600
1200
2400
4800
9600
19200
BAUD RATE is the transmission speed in bits per second.
300 BAUD
600 BAUD
1200 BAUD
2400 BAUD
4800 BAUD
9600 BAUD
19200 BAUD
Continued on next page
To Next Page
Loading...
Need help?
General
