User Manual

Using Modbus RTU 4-13
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Adapter Parameter Direct
Access
Table 4.L provides an overview of the Modbus register addresses for
directly accessing the adapter parameters.
Table 4.L Adapter Parameter Direct Access Modbus Register Map
Modbus Register Parameter Description
4x0101 DPI Port
4x0102 DPI Data Rate
4x0103 Net Addr Cfg
4x0104 Net Addr Act
4x0105 Net Rate Cfg
4x0106 Net Rate Act
4x0107 Net Parity Cfg
4x0108 Net Parity Act
4x0109 Stop Bits Act
4x0110 Net Chksum Type
4x0111 Network Timeout
4x0112 Ref/Fdbk Size
4x0113 Datalink Size
4x0114 Reset Module
4x0115 Comm Flt Action
4x0116 DPI I/O Cfg
4x0117 DPI I/O Act
4x0118 Flt Cfg Logic
4x0119 Flt Cfg Ref Lo
4x0120
(1)
(1)
A write access to this register triggers a store/update of this parameter value
to the internal adapter EEPROM as a 32-bit value.
Flt Cfg Ref Hi
4x0121 Flt Cfg A1 In Lo
4x0122
(1)
Flt Cfg A1 In Hi
4x0123 Flt Cfg A2 In Lo
4x0124
(1)
Flt Cfg A2 In Hi
4x0125 Flt Cfg B1 In Lo
4x0126
(1)
Flt Cfg B1 In Hi
4x0127 Flt Cfg B2 In Lo
4x0128
(1)
Flt Cfg B2 In Hi
4x0129 Flt Cfg C1 In Lo
4x0130
(1)
Flt Cfg C1 In Hi
4x0131 Flt Cfg C2 In Lo
4x0132
(1)
Flt Cfg C2 In Hi
4x0133 Flt Cfg D1 In Lo
4x0134
(1)
Flt Cfg D1 In Hi
4x0135 Flt Cfg D2 In Lo
4x0136
(1)
Flt Cfg D2 In Hi
4x0137 Clear Counters
4x0138 N2 Ref Scale Lo
4x0139
(1)
N2 Ref Scale Hi
4x0140 Stop Bits Cfg
4x0141 RTU Ref Adjust