Hello,

I have a set up with 3 heatpumps with modbus protocol.
First of all i have to name that i am a new bee in modbus (did some online studies)

I have 3 heat pump (in Cascade) all with slave ID 1
Tot communicate with these 3 units each need to have there own ID
my questions
1 -Is it poseble to find out where the slave ID is stored?
2 can i change the id by CASModbusScanner?
3- how do i do that.

In case of extra info please ask

 

You can only change the slave ID using CASModbusScanner if it is available via a Modbus register exposed by the device. Can you attach the complete register list for the heat pump (or at least the vendor and model number)?

There are a few common ways that the slave ID is set on Modbus devices.

1. Dip switches or rotary dials
2. Display and keypad menu options
3. Configuration software running on a PC that connects to the device via USB, serial, Ethernet, Bluetooth, etc.
4. By establishing a Modbus connection using the default settings and writing to a specific register

On a side note, if you're already using ModScan, there's no need to use a different Modbus master, such as CASModbusScanner, to write to a slave ID register (assuming one exists on the heatpump).

 

There are dip switches on the printboard. But not any cluw how that works....

 

What is the vendor and model of the heat pumps?

Can you attach a user's manual for the device?

 

See pic

 

What is the vendor and model of the heat pumps?

Can you attach a user's manual for the device?

I have, a manual but there is no info about it. But I will send.

Brand is Nulite made in China.

I am in contact withe them. But it's hard to get info....

 

You can only change the slave ID using CASModbusScanner if it is available via a Modbus register exposed by the device. Can you attach the complete register list for the heat pump (or at least the vendor and model number)?

There are a few common ways that the slave ID is set on Modbus devices.

1. Dip switches or rotary dials
2. Display and keypad menu options
3. Configuration software running on a PC that connects to the device via USB, serial, Ethernet, Bluetooth, etc.
4. By establishing a Modbus connection using the default settings and writing to a specific register

On a side note, if you're already using ModScan, there's no need to use a different Modbus master, such as CASModbusScanner, to write to a slave ID register (assuming one exists on the heatpump).

 

What is the vendor and model of the heat pumps?

Can you attach a user's manual for the device?

 

I look for the manual...