Carrier RTU Open v3 - Page 52

Appendix C: Modbus Protocol Implementation Conformance Statement
RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016
Integration Guide All rights reserved
48
Unsigned Integer (UINT) 0 - 65535
3 – Read Holding Register
6 – Preset Single Register
16 – Preset Multiple Register
Signed Integer (SINT) -32768 - 32767
3 – Read Holding Register
6 – Preset Single Register
16 – Preset Multiple Register
Discrete Input (DI)
0 = Off, 1 = On
2 – Read Input Status
Discrete Output (DO) 0 = Off, 1 = On
1 – Read Coil Status
5 – Force Single Coil
15 – Force Multiple Coils