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Modbus Read, Write and Override Parameters plus Exception Codes
4/07 UDC2500 Universal Digital Controller Product Manual 193
10.5 Setpoints
Overview
You can use two separate local setpoints in the controller. The identifying register
addresses listed in
Table 10-5 allow you to select which setpoint you want to use and to
enter a value in Engineering Units (whichever is selected at register address 00A1) for
that setpoint via communications.
Register Addresses
Make your selection using register address 00AD and enter the value for the setpoint
chosen using register address in
Table 10-5.
Table 10-5 Setpoint Code Selections
Parameter
Description
Register
Address
Data
Type
Access Data Range or
Enumerated Selection
Hex Decimal
Local Setpoint #1 0027 039 FP R/W Value within the setpoint
range limits
Local Setpoint #2 0035 053 FP R/W Value within the setpoint
range limits
Number of Local
Setpoints
00AD 173 INT R/W 00 = Local Setpoint #1
only
01 = 2nd Local Setpoint via
keyboard or
communications
Associated Parameters
Refer to
Table 10-6 to display or change any of the parameters associated with the
setpoint.
Table 10-6 Setpoint Associated Parameters
Parameter Register Address
Hex Decimal
Setpoint Limits 0007, 0008 007, 008
Computer Setpoint 007D 125