Product overview
2.2 Functions
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
16 Equipment Manual, V1.0, 01/2021, A5E47073911-AA
2.2.3 Measured value determination
You can select one at a time from the following measured values reported:
• Frequency measurement with the unit of millihertz (-800000000 to +800000000
meaning -800000.000 to +800000.000 Hz)
• Period measurement with the unit of microseconds (-25000000 to +25000000 meaning
-25.000000 to +25.000000 seconds)
• Velocity measurement is the calculated velocity * 1000 to include fractional portion of the
calculation (-2147483648 to 2147483647 meaning -2147483.648 to +2147483.647
velocity unit)
All measured values are returned as scaled integers with the units noted above.
Negative values are reported when counting down, positive values are reported when
counting up.
Update time
Calculated measured value accuracy is influenced by the duration of selected update times.
You can configure the interval at which the technology module updates the measured values
cyclically to the F-CPU. Setting a longer update time interval allows the module to collect
more data to calculate a more accurate measured value, but reaction time increases.
The following figure illustrates the effect of update time on the approximate accuracy
of measured value calculations:
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