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Modbus Read, Write and Override Parameters plus Exception Codes
4/07 UDC2500 Universal Digital Controller Product Manual 191
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
Input #2 7C 124 FP RD In Engineering Units or
Percentage
PV, SP, Output 7A 122 FP RD In Engineering Units or
Percentage
10.3 Read Software Options Status
Read
Doing a Read of register address 00B9 listed in
Table 10-2 will tell you which of the
available options are enabled / installed or disabled / not installed.
Table 10-2 Option Status
Parameter
Description
Register
Address
Data
Type
Access Data Range or
Enumerated Selection
Hex Decimal
Option Status
(Read only)
00B9 185 INT RD
See
Figure 10-1.
The data field in the response message will be a decimal number from 0 to 255. Convert
the decimal number to binary as shown in Figure 10-1.to determine which options are or
are not active.
0 to 255
Convert decimal to binary
0
=
not installed
1
=
installed
EXAMPLE:
3
Binary
SP Programming
–
installed
0
0
0
0
0
1
1
0
Dual Display
–
installed
SP Programming
0 to 255
Convert decimal to binary
0
=
not installed
1
=
installed
EXAMPLE:
Binary
SP Programming
–
installed
0
0
0
0
0
1
1
0
–
installed
EXAMPLE:
Binary
SP Programming
–
installed
0
0
0
0
0
0
1
1
–
installed
SP Programming
Dual Display
Limit Controller
Figure 10-1 Software Option Status Information