Product overview
2.2 Functions
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
20 Equipment Manual, V1.0, 01/2021, A5E47073911-AA
• HSC0 Current Value
• HSC0 Measured Value
See also
Refer to "Explanation of parameters (Page 36)" for additional information on the F-TM Count
module control interface commands and feedback status and event data.
2.2.5 Counter input diagnostics
Counter discrepancy
The module uses multiple internal counters to monitor the single counter-module input.
Discrepancy tests are performed to ensure respective internal counter values are compared
for acceptable equivalency. If these evaluations do not provide expected results, a channel
diagnostic event is generated.
After generating the diagnostic event, the module reinitializes its internal count to the last
valid count before the discrepancy was detected. The module then continues monitoring the
encoder and accumulating counts while the diagnostic is present.
A count value of zero and status values of zero (safe state values) are provided to your safety
program while the diagnostic is present. When the error is resolved and the channel is
reintegrated, the module will return the accumulated count and status values to your safety
program.
Discrepancy errors may result in a loss of counts due to the count being set back to the
last known good values.
Your safety program must determine whether the reported count value remains
representative of actual position.
If the position is lost, your safety program must do a homing operation and then reset the
counter to its respective start value.
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