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Wiser for KNX and modbus problem
#1
Hello,

we are experiencing a little problem with some modbus devices (3 energy meters, a heat pump and a HRV system), we are currently reading and writing on those devices but we have a large amount of errors (operation timed out), approximately 1 per device every minute.

We tried to ground the shield of the modbus cable and we install two terminating resistors, but nothing seems to work fine. The only way to manage those errors is to set a polling rate at least of 60 seconds, they do not disappear but the system seems to handle them.

We suppose that there are some interferences due to the heat pump because we noticed that when it's running the number of errors tend to increase.

Any suggestion?

Thank you for your help.
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Messages In This Thread
Wiser for KNX and modbus problem - by Kilogica - 18.01.2021, 17:03

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