Modbus Read, Write and Override Parameters plus Exception Codes
8/05 UDC2500 Universal Digital Limit ControllerProduct Manual 99
10.2 Reading Control Data
Overview
The following control data can be read from this instrument:
• Input 1
Register Addresses
Use the identifying codes listed in Table 10-1 to read the specific items.
A Write request for these codes will result in an Error message.
Table 10-1 Control Data Parameters
Parameter
Description
Register
Address
Data
Type
Access Data Range or
Enumerated Selection
Hex Decimal
Input #1 7B 123 FP RD In Engineering Units or
Percentage
LSP1 27 30 FP R/W In Engineering Units
Within Set point Limits
10.3 Miscellaneous Read Onlys
10.3.1 Register Addresses for Read Onlys
The identifying register addresses listed in Table 10-2 represent some information that is
Read only. No Writes allowed.
Table 10-2 Miscellaneous Read Onlys
Parameter
Description
Register
Address
Data
Type
Access Data Range or
Enumerated Selection
Hex Decimal
Software Type 008B 139 INT RD READ only
38 = UDC2500 Limit
Software Version 00A7 167 INT RD READ only
Value less than 255
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