How to read the voltage and current values ​​of a Danfoss FDC302 inverter on a S7315 clp?

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Split from CPU 315 2DP and Danfoss drive comm via Profibus DP.

Hello tecrmb;

This is explained quite well, in this (short) manual from Danfoss:

Siemens S7 PLC and FC 300 Profibus – Danfoss

files.danfoss.com/download/Drives/MN33A102.pdf

As you can see from the screenshot belopw, when you start configuring the drive you should select a PPO_ telegram that allows for a number of register values to be exchanged on top of the standard Control word and (Speed) Reference word. PPO5 for example gives you 4 Parameter channel words (that you do not need for the moment) and 6 Process channel words, the Control Word, the Reference and 4 extra registers you can associate with drive parameters as shown in the right side of the screenshot.

Select the parameters you want to read (voltage, for example) and link them to P915/3 ... P915/6, as shown. They will then be transferred cyclically to the PLC during the Profibus transmission in the adresses associated with PCD 4 ... PCD 6.

Hope this helps,

Daniel Chartier