Modbus Write Issues

Hi All,

I am currently using the node-red-contrib-modbus node to write a value to my Victron Multiplus 2 Inverter/charger. I am running mode 3 which is my own contol loop using node red. A new value must be written every 60s otherwise the inverter/charger will go into passthru and do nothing.

I keep having random times where my inverter goes into passthru. I cant understand why it can run for days with no issues then stop?

Today it went into passthru at 07:19 (ignore the blue circle). But my flow was still calculating and writing values at this time.

I am also reading back the values via modbus and into home assistant for fault finding and I can see the last value was -360. Its like my messages are not reaching the server.

.

Ive checked the Venus GX and its all up and running. All the services are available and running.

image

The node appears to be configured correctly

The way I have to fix this is to go into node red and move any node so it detects a change and Deploy. Then all fires back up and starts working again.

Any idea what I could next to locate this issues?

Thanks

Gareth