I'm trying to learn node-red over programming BMS in Niagara.
Coming from Niagara I have a couple of iSMA MIX38 IO's that I'm trying to communicate with in node-red via modbus TCP/IP.
In Niagara when I would add the DO's there's a preloaded block for each output.
This is what it contains for DO-4
As you can see there's a data address, absolute address and a bit number.
The bit number is the only one different on all the DO outputs. and ranges from 0-11 which translate to DO1-DO12.
I've tried to follow different guides online, but none of them seems to work for me - keep in mind that I no master programmer and new at this, so I might have overlooked something.
What I have success with is writing to FC6 and address 17.
There I can write numbers 1, for DO1, 2 for DO2, 4 for DO3 all the way up to 2048 for DO12.
But if I turn on one output eg. DO3 and I the try to turn on DO8, DO3 turns off and DO8 opens.
And i figure that making a bunch of outputs in node-red for each scenario of outputs to be on or off would be a huge mess.
Is there any simple way to get this to work?
In niagara I just drag a block for the DO I want to controll and send a Boolean true or false signal.
I've looked around for a couple of days and stumbled across a solution @UnborN did in another thread.
For anyone looking for this in the future the mapping for the DI's and DO's for this iSMA stuff is done in this flow.
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