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Writing multiple coils using AMX Modbus module



The AMX modbus module works perfectly with the modbus functions to write to single coils, holding or input registers but the comm module which is open doesn't have a function to write to multiple coils. I have attached the function details using the link below and the modbus mapping is given in the attachment in this post. Multiple coils is needed for room modes, fan speed modes, etc.

http://modbustools.com/modbus.asp#function15

Comments

  • ajish.rajuajish.raju chief evangelist of favante Posts: 185
    Here is an update. I have attached the comm module that i have modified with write multiple coils that i have written and also the notifications response when i use this command. If any one has done something similar, please guide me.
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