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MarkusR posted a topic in MitsubishiHi everybody, I have a GT2310 communicating with the Mitsubishi F800 VFD. I am using the Freqrol 800 communication driver, connected to the RS-485 terminals of the GOT and on the F800. The comm settings are the same on both devices. I also tried to use the “auto negotiation” setup. I have communication between the two devices. I can read and write to F800 registers. Anyways, The GT designer diagnostics is complaining about a communication error in the system alarms. The error can be reset but it will appear again. This also happened when I created a new, empty project where just the communication was setup as described above. Did anyone experienced the problem and how to troubleshoot / solve this? Best regards