Working with Node Red in OS Large. MODBUS command doesn’t transmit onto the network. Ekrano is wirelessly connected to router, thence by hardwire to MODBUS I/O device, SeaLevel eI/O ethernet pn 120E-ROHS.
When I use MODBUS-Write node from OS Large Nod Red, the subscript note says “Connected” when at rest, but when I inject either a 1 or TRUE, it says ‘queueing’ then ‘timeout.’ Then it reconnects.
When I run Node Red from my windows PC, connected wirelessly to same router, I was able to write to MODBUS coils. I did need to open port 502 in the router. Router is a GL-iNet AX1800.
I use WireShark to track ethernet traffic. I can see the coil write command when it originates on my windows pc and successfully goes to the MODBUS device. But I get no output from Ekrano with the coil write command. There is a steady stream of coil reading traffic from Ekrano to windows PC.
What am I missing?