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Siemens AG
Entry type: FAQ Entry ID: 88736379, Entry date: 02/25/2014
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How do you read out the direction of rotation of an axis on a Technology CPU?

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Description
In the Technology CPU there are no status bits which can be used to display the current direction of rotation of an axis.
However, this can be easily derived by program from the setpoint velocity or from the actual velocity.

Below is are the short program sequences required for this.


Fig. 01

*) This value depends on the application in each case and it must be selected so that you do not have flickering of the bits at standstill.

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Additional Keywords
T-CPU 315T 317T 137TF PLCopen

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