12-11-2022, 01:07 PM
I have recently completed an integration between Comfort and Samsung AC using Modbus, so I thought I would just share the config and some of the lessons learn\'t!
The Samsung system is 2 x multi split systems, one with 3 indoor units and one with 2 indoor units. The two outdoor condensers (one per system) are each fitted with Samsung MIM-B19N modbus cards, wired in a star configuration to the UCM modbus.
Firstly, you need to configure the UCM modbus to operate at 9600bps.
Secondly, you need to configure all the indoor units to \'enable central control\' - something tech support had to help with; unit you have done this the Modbus card in the condenser reports E604 error message.
You have to calculate the address of each modbus element, details are in the Samsung manual, but in short:
The first unit is 0, second unit is 1, third unit is 2 etc.
You use a multiplier, but for my config the addresses are as per the attached image. You can see how one system (modbus slave 1) has the 2 indoor units and the second system (modbus slave 2) has the 3 indoor units.
I have used responses to set all the units on, off, and at particular modes and set points etc. Touch wood (it\'s only day 2) it\'s all working a dream! Another lovely and simple integration!
The Samsung system is 2 x multi split systems, one with 3 indoor units and one with 2 indoor units. The two outdoor condensers (one per system) are each fitted with Samsung MIM-B19N modbus cards, wired in a star configuration to the UCM modbus.
Firstly, you need to configure the UCM modbus to operate at 9600bps.
Secondly, you need to configure all the indoor units to \'enable central control\' - something tech support had to help with; unit you have done this the Modbus card in the condenser reports E604 error message.
You have to calculate the address of each modbus element, details are in the Samsung manual, but in short:
The first unit is 0, second unit is 1, third unit is 2 etc.
You use a multiplier, but for my config the addresses are as per the attached image. You can see how one system (modbus slave 1) has the 2 indoor units and the second system (modbus slave 2) has the 3 indoor units.
I have used responses to set all the units on, off, and at particular modes and set points etc. Touch wood (it\'s only day 2) it\'s all working a dream! Another lovely and simple integration!