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I have a EM24 on the USB Dongle and it workes fine. Then i added a ET112 (and changed the Modbus ID of the EM24 from 1 to 2 as described in the manual).
Now no Meter is recognised. If i disconnect one meter (EM24 or ET112) the other one works fine. So both meters are OK (and the cable too).
What can i do?
So there is no problem with the Modbus addresses
But the question is: should i regular connect the GND between the energy meters and the USB Dongle?
My configuration:
EM24 ----7m cat7 cable ---- USB adapter ---- 8m cat7 cable ----ET112
No termination, two twisted cables for A and B, another cable for GND
Hi
You need to change the ID address using the the CaloGavzz software not the Venus software.
I changend the ID directly on the Energy Meter - as described in the Victron Energy Meter EM24 RS485 manual.
I changed the IDs in Carlo Gavazzi Software and the Meters are correctly recognized, but the ET340 gets sometimes lost without any reason :(
Is the cable maybe too long. I used the original 5m one without any extension. Only cut it to passtrough to the second meter.
the GX device addressing is limited. You have two choices, simple = run two separate RS485 cables. or more complicated change the device modbus address, but set them as discussed above on the actual meter using the Gavazzi software. Install it on a laptop, plug the USB RS485 cable into the laptop, change the address of 1. You must temporarily disconnect the one meter while you programme the other. I found it here. Page is Norwegian but programme runs in English https://www.gavazzi.no/nedlasting/software/software-ucs/
