First implementation of P77 inverter

Ask Questions Mechatronics & Motion
1

Good morning everyone,
in our company project we are implementing the use of the new P77 inverters.
With the older P66 models, we had the possibility to write motor parameters at runtime.
Today, using the AsEPL library, I am trying to achieve the same result, but without success. I am able to read the motor parameters written directly in the physical view, but I cannot write to those same registers — the EplSDOWrite function block stops and throws the error shown in the screenshot.

Does anyone have any hints or suggestions?
I’m using Automation Studio 6.5

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Below motor parameters written in the Physical View

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Below Motor Parameters read trough the AsEPL library.

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Below The error reported in the FB EplSDOWrite.

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2

Hi!

Writing parameters with EplSDOWrite should still be possible. According to the manual of the drive the data length of your parameter (2C01:4) is 2 Bytes (U16), but you entered 4 Bytes. I guess that’s the reason the function block fails to write.

Best regards,
Manfred

3

Thank you very much, it was really just a parameter‑declaration oversight. In the manual, where can I find the data types for the Powerlink addresses?

4

Thanks so much @mtwzinga for the feedback.
Ciao
Valerio

5

You can find the data types either in the Automation Help or in the manual (Comissioning → Appendix).