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Contents
Preface ..................................................................................................................................................................................i
Safety warnings.................................................................................................................................................................i
Disclaimer..........................................................................................................................................................................i
1.Safety precautions ....................................................................................................................................................4
2.Overview ....................................................................................................................................................................5
3.Settings ......................................................................................................................................................................6
3.1.Modbus Slave ID................................................................................................................................................ 6
3.2.Baud rate............................................................................................................................................................ 6
3.3.Other communication settings ........................................................................................................................... 6
3.4.RS-485 termination ............................................................................................................................................ 6
4.Installation .................................................................................................................................................................7
4.1.Physical connection between the Procon A1M and M-, S-, and P-Series indoor units .................................... 7
4.2.Power supply...................................................................................................................................................... 7
4.3.Modbus connections .......................................................................................................................................... 7
5.Status LEDs ...............................................................................................................................................................8
6.Modbus connection ..................................................................................................................................................9
6.1.Modbus background .......................................................................................................................................... 9
6.2.Modbus connections .......................................................................................................................................... 9
7.Modbus tables .........................................................................................................................................................10
7.1.Modbus registers.............................................................................................................................................. 10
7.2.Discrete Inputs ................................................................................................................................................. 10
7.3.Coils ................................................................................................................................................................. 10
7.4.Input registers .................................................................................................................................................. 10
7.5.Holding registers .............................................................................................................................................. 11
