Product overview
2.2 Functions
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
Equipment Manual, V1.0, 01/2021, A5E47073911-AA
17
For example: the figure shows that at a frequency of 100 Hz, the percent error in the
measured value is about 10 times greater at a 1 second update time as compared to a 5
second update time.
Note
The safety reaction time is influenced by the chosen update time when
using measured
values as part of your safety program (for example, at about 100 Hz, the relative error with a
1 second update time is approximately three times greater than a 5 second update time). For
additional information, refer to Response times of the F-TM Count module (Page 85).
Note
The user should consider the measured value accuracy at the user's specified counting
frequency range when determining the Safety Limited Speed "Speed limit" setting.
Gate control
Software (SW) gating is required to control when counting is permissible. When the SW gate
is open, counting is enabled.
When the SW gate is closed the following occurs:
• Counting is disabled until the gate is opened again. Position is not maintained if
movement occurs.
• Measured value calculations are still performed, but the last reported measured value is
continually reported until the gate is opened again.
• Safety monitoring operations will still be performed. However, their progress is paused
until the gate is again opened. Movement that violates specified limits will not be
detected.
You can configure the reaction to the gate opening.
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