Siemens SIMOTION C 230-2 Operating Instructions Manual page 75

– Measuring on virtual axes
Configuration example for global measuring
Configuration procedure in SIMOTION SCOUT:
SIMOTION C
Operating Instructions, 11/2022, A5E33441428B
Note
Local measuring (onboard) on SIMOTION C
A measurement is only undertaken when there are at least two servo cycles between the
_enableMeasuringInput command being called and the real switching signal expected on
the measuring input (positive/negative flank).
In order to reliably guarantee time-critical processes, the programming should be
undertaken in a synchronous task, e.g. IPO-synchronous task. It may take up to two servo
cycles for the measurement to be available in Messtaster.counterMeasuredValue1 after
the status change in Messtaster.actualInputState (POSITIVE => NEGATIVE or vice versa).
When the measurement result is received, the measurement position is stored. Once the
measurement has been taken, the state variable is set to TRIGGER_OCCURED, and the
measured values can be evaluated using the measuredValue1 and measuredValue2
variables for two measured edges.
The counterMeasuredValue1 and counterMeasuredValue2 counter variables are defined
for the measuredValue1 and measuredValue2 system variables and are automatically
incremented by a value of one for each measurement input. New results can be traced
immediately and can also be read from non-IPO-synchronous tasks.
You will find detailed information on this subject in the SIMOTION Function
Manual Output Cams and Measuring Inputs.
Interfaces
4.8 I/O interface
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