Modbus/RTU polling data from PL260

user13099 · Post by **user13099** » 29/04/2016, 8:40

Hi,

I have a PL260 with a third party SCADA application running polling on the EXP1 port. Whenever I try to poll more than 20 registers the PLC does not respond healthily (4x0001 - 4x0020 works, 4x0001 - 4x0021 does not work - N.B. I'm not using VW0 aka 4x0000). I have tried 'Modbus Poll' as well and the same result occurs.

Is there a limitation for any reason, I didn't see anything in the user manual?

Regards

Post by **Pixsys tecnico 1** » 29/04/2016, 11:53

Hi,
you can do a multi-reading up to 16 consecutive words. Then you must send a new Modbus reading package

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