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Deployment I/O periphery
Frequency measurement > Properties
5.7 Frequency measurement
5.7.1 Properties
Measuring procedure
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In this operating mode the CPU counts the incoming pulses during a specified inte-
gration time and outputs them as frequency value.
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Integration time 10ms ... 10000ms in steps of 1ms configurable
Control by the user program via SFB 48
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More information about the usage of this block may be found in the
manual "SPEED7 Operation List" from VIPA.
1
Integration time
2
Counting pulse
3
SW gate
4
Frequency measurement start
5
Frequency measurement stop
The measurement is carried out during the integration time and is updated after the
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integration time has expired.
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If the period of the measured frequency exceeds the assigned integration time, this
means there was no edge 0-1 during the measurement, the measurement value 0 is
returned.
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The calculated frequency value is supplied in "mHz" units.
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The measurement value can be read with MEAS_VAL from SFB 48.
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As long as the SW gate is open, you can request the calculated frequency.
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The number of activated channels does not influence the max. frequency, which is
defined in the technical data.
1
Integration time
2
Counting pulse
3
SW gate
4
Evaluated frequency
The counting function is disabled during the pulse width modulation on
the same channel.
VIPA System MICRO
HB400 | CPU | M13-CCF0000 | en | 18-50
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