6 posts in this topic

Hi Guy's,

I have two E1043 screens running off an FX3U plc, I keep getting a comms error on the second HMI. I have tried reloading the program and also replacing the Comms cable, but still the same. I have checked the comms settings in my project and all looks ok.

Any ideas please?

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Posted (edited)

Are you running through an ethernet switch?

If so- connect to the switch with your laptop and ensure you can ping both the PLC and the HMI.

If this is all good, might be worth a power cycle incase one of the ethernet ports has been closed.

 

Regards

Daniel

Edited by collinsd70

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Hi Daniel,

I am running through RS232 between both HMI's.

Regards

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Have you tried swapping the cables between HMIs to see if the fault moves?

If your happy your software and configuration is correct, you need to try substituting components to try and narrow down the cause of the fault.

 

 

Regards

Daniel

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What hardware do you have on the PLC? FX3U have no RS232 ports by default... Converters in between?

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Is this your set up?

PLC <-> RS422<->HMI 1 <-> RS232 <-> HMI2

Difficult to troubleshoot without details of the interconnecting cables. Did you make the RS232 cable or is it pre-made?

If pre-made is it definitely "Crossover"

Also post your E-designer peripherals set up.

I would try:

PLC <-> RS422<->HMI 1 <-> Ethernet BDTP server/client set up <-> HMI2

I found this to be simpler and more reliable.

Assuming your setup allows.

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