Ethernet comm problem with PLC when inverter enables.

[AB2005]

Hi,

I've implemented some countermeasures, such as grounding the 0VDC and directly connecting everything to ground. One observation I've made is that the Ethernet communication problem arises only when I use an Ethernet switch between the PLC and laptop. When I remove the Ethernet switch, there are no communication issues. I typically use the Ethernet switch to connect the HMI and PLC with the laptop. During machine operation, Ethernet isn't needed as the HMI communicates with the PLC via RS232.

 

[Gleichner33]

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