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Hello everyone

I am an electrical engineer and a member of a volunteer search and rescue team in Iceland. I have installed a V570 PLC in our new HQ which we use to control lighting and windows. We have got few Dali controlled lights that I would like to connect to and control over modbus.

Can anyone tell me what I need for that to work and maybe send me some examples to work with?

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Hello Thorolfur, welcome to the forum.

Do you have a gateway DALI to MODBUS RS485?

There will be a table in the gateway where you can see the operands to control from the PLC.

For examples in modbus look on the HELP MENU -> EXAMPLES -> COMMUNICATIONS -> MODBUS

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I took a quick look at the DALI manual and the voltage levels are different from RS232 and RS485, so you will need a converter/gateway as Nacho suggests. You can not connect DALI directly to a Unitronics PLC.

Joe T.

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