
Appendix B: CRC-16 Calculation
02/13 Modbus® RTU Serial Communications User Manual 35
A.4 Loop 2 and Extended Value Integer Register Map – UDC3500
The following table applies to the following instrument: UDC3500 – Loop2 and Exended range.
Address
(hex)
Register
(decimal)
Parameter Name Access Notes
0100 40257 PV R Signed 16 bit integer Prescale * 10 Note 5
0101 40258 RV R Signed 16 bit integer Prescale * 10
0102 40259 Working Set Point R/W Signed 16 bit integer Prescale * 10 Note 5
On a write the instrument will update the
proper set point according to the loop’s
currently selected set point.
0103 40260 Output R/W Signed 16 bit integer Prescale * 10 Note 11
0104 40261 Input #3 R Signed 16 bit integer Prescale * 10
0105 40262 Input #4 R Signed 16 bit integer Prescale * 10
0106 40263 Gain #5 (Prop Band #5 if active) R/W Signed 16 bit integer Prescale * 10
0107 40264 Direction R Signed 16 bit integer Prescale * 10
0108 40265 Reset #5 R/W Signed 16 bit integer Prescale * 10 Note 1
0109 40266 Rate #5 R/W Signed 16 bit integer Prescale * 10 Note 1
010A 40267 Cycle Time #1 R/W Signed 16 bit integer Prescale * 10 Note 2
010B 40268 PV Low Range R Signed 16 bit integer Prescale * 10
010C 40269 PV High Range R Signed 16 bit integer Prescale * 10
010D 40270 Alarm #3 SP #1 R/W Signed 16 bit integer Prescale * 10 Note 7
010E 40271 Alarm #3 SP #2 R/W Signed 16 bit integer Prescale * 10 Note 7
010F 40272 Alarm #3 Action
Bit 0 – AL3SP1
0=Low or Begin
1=High or End
Bit 1 – AL3SP2
0=Low or Begin
1=High or End
R Signed 16 bit integer Prescale * 10 Note 6
0110 40273 Gain #6 (Prop Band #6 if active) R/W Signed 16 bit integer Prescale * 10
0111 40274 Deadband R/W Signed 16 bit integer Prescale * 10
0112 40275 Reset #6 R/W Signed 16 bit integer Prescale * 10 Note 1
0113 40276 Rate #6 R/W Signed 16 bit integer Prescale * 10 Note 1
0114 40277 Cycle Time #2 R/W Signed 16 bit integer Prescale * 10 Note 2
0115 40278 LSP #1 R/W Signed 16 bit integer Prescale * 10 Note 5
0116 40279 LSP #2 R/W Signed 16 bit integer Prescale * 10 Note 5
0117 40280 Alarm #4 SP #1 R/W Signed 16 bit integer Prescale * 10 Note 7
0118 40281 Alarm #4 SP #2 R/W Signed 16 bit integer Prescale * 10 Note 7
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