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ifm Programming Manual ecomatmobile BasicController (CR0403) Runtime System V03.02 2015-04-01
Configurations Function configuration of the inputs and outputs
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Fast inputs
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The devices dispose of fast counting/pulse inputs for an input frequency up to 30 kHz (→ data sheet).
If, for example, mechanical switches are connected to these inputs, there may be faulty signals in the
controller due to contact bouncing.
Appropriate function blocks are e.g.:
FAST_COUNT Counter block for fast input pulses
INC_ENCODER (→ page 171) Up/down counter function for the evaluation of encoders
PERIOD (→ page 175) Measures the frequency and the cycle period (cycle time) in [µs] at the indicated channel
When using these units, the parameterised inputs and outputs are automatically configured, so the
programmer of the application does not have to do this.
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Use as binary inputs
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The permissible high input frequencies also ensure the detection of faulty signals, e.g. bouncing
contacts of mechanical switches.
► If required, suppress the faulty signals in the application program!
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