Appendix D: Modbus Protocol Implementation Conformance Statement - United Technologies Carrier Unit Vent Open Integration Manual

Appendix D: Modbus Protocol Implementation Conformance Statement

Appendix D: Modbus Protocol Implementation Conformance Statement
Serial Transmission Mode:
RTU
Communication Types:
2-wire EIA-485,
Function Codes:
01 – Read Coil Status
02 – Read Input Status
03 – Read Holding Registers
04 – Read Input Registers
05 – Force Single Coil
06 – Preset Single Register
15 – Force Multiple Coils
16 – Preset Multiple Coils
Register Type:
Float Value (FLOAT)
Unsigned Integer (UINT)
Signed Integer (SINT)
Discrete Input (DI)
Discrete Output (DO)
Unit Ventilator
Integration Guide
Supported?
Slave (Slave is the Default Dipswitch setting)
Baud
Data Bits:
rates:
9600, 8
19200,
38400,
76800
Purpose:
Read Discrete Outputs
Read Discrete Inputs
Read Holding Registers
Read Input Registers
Write Discrete Outputs (single)
Write Holding Registers (single)
Write Discrete Outputs
Write Holding Registers
Range:
Single-Precision IEEE floating point
value
0 - 65535
-32768 - 32767
0 = Off, 1 = On
0 = Off, 1 = On
38
Parity: Stop Bits:
None 1
Used with Register
Numbers:
00001 - 09999
10001 - 19999
40001 - 49999
30001 - 39999
00001 - 09999
40001 - 49999
00001 - 09999
40001 - 49999
Function Codes Used with this
Register Type:
3 – Read Holding Register
6 – Preset Single Register
16 – Preset Multiple Register
3 – Read Holding Register
6 – Preset Single Register
16 – Preset Multiple Register
3 – Read Holding Register
6 – Preset Single Register
16 – Preset Multiple Register
2 – Read Input Status
1 – Read Coil Status
5 – Force Single Coil
15 – Force Multiple Coils
CARRIER CORPORATION ©2019
All rights reserved