
Appendix B: CRC-16 Calculation
32 Modbus® RTU Serial Communications User Manual 02/13
Address
(hex)
Register
(decimal)
Parameter Name Access Notes
001C 40029 Working Set Point R/W Signed 16 bit integer Prescale * 10 Note 5
On a write to this register the instrument
will update the proper set point according to
the loop’s currently selected set point.
Use this register for operator set point value
changes ONLY. Use SP Override for
computer-generated set point values.
001D 40030 Output Low Limit R/W Signed 16 bit integer Prescale * 10
001E 40031 Output High Limit R/W Signed 16 bit integer Prescale * 10
001F 40032 Output Working Value R/W Signed 16 bit integer Prescale * 10
0020 40033 PV Override Value R/W Signed 16 bit integer Prescale * 10
0021 40034 SP Override Value R/W Signed 16 bit integer Prescale * 10 Note 5
0022 40035 Output Override Value R/W Signed 16 bit integer Prescale * 10
0023 40036 Ratio R/W Signed 16 bit integer Prescale * 10 Note 4
0024 40037 Bias R/W Signed 16 bit integer Prescale * 10 Note 4
0025 40038 Deviation R Signed 16 bit integer Prescale * 10
0026 40039 LSP #3 R/W Signed 16 bit integer Prescale * 10 Note 5
0027 40040 Percent Carbon Monoxide - CO R/W Signed 16 bit integer Prescale*1000 Note 3
0028 40041 Decimal Point R/W Signed 16 bit integer Prescale* 1 Note 3
0029 40042 Alg1 Bias R/W Signed 16 bit integer Prescale * 10 Note 8
002A 40043 Alg2 Bias R/W Signed 16 bit integer Prescale * 10 Note 9
002B 40044 LSP #4 R/W Signed 16 bit integer Prescale * 10 Note 5
002C 40045 Current Output #2 R Signed 16 bit integer Prescale * 10 Note 5
002d 40046 Current Output #3 R Signed 16 bit integer Prescale * 10 Note 5
0038 40057 Fuzzy Enable R/W Unsigned 16 bit integer
0=Disable 2= Enable2
1=Enable 3=Enable12 Note 6
0039 40058 Shed Enable R/W Bit Packed
Bit 0: 0:Disable 1:Enable Note 6
003A 40059 Auto/Manual State R/W Bit Packed
Bit 0: 0:Manual; 1:Auto
Bit 1-15: Unused Note 12
003B 40060 Set Point State R/W Unsigned 16 bit Integer
0=LSP1 3=CSP
1=LSP2 4=LSP4
2=LSP3 5=RSP Note 12
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