IFM Ecomat 100 Mobile CR0301, Руководство по программированию

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ifm Programming Manual ecomatmobile CabinetController (CR0301) Runtime System V05 2016-04-21
Configurations Function configuration of the inputs and outputs
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Binary inputs: configuration and diagnosis
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► Configuration of each input is made via the application program:
• configuration byte INxx_MODE
→ chapter
Possible operating modes inputs/outputs
(
→ page
187 )
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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.
Furthermore it has to be noted whether the pulse inputs are designed for frequency measurement
(FRQx) and/or period measurement (CYLx) (
→ data sheet).
Appropriate function blocks are e.g.:
On FRQx inputs:
FAST_COUNT (→ page 131 ) Counter block for fast input pulses
FREQUENCY (→ page 132 ) Measures the frequency of the signal arriving at the selected channel
On CYLx inputs:
PERIOD (→ page 135 ) Measures the frequency and the cycle period (cycle time) in [µs] at the indicated channel
PERIOD_RATIO (→ page 137 ) Measures the frequency and the cycle period (cycle time) in [µs] during the indicated periods at
the indicated channel. In addition, the mark-to-space ratio is indicated in [‰].
PHASE (→ page 139 ) Reads a pair of channels with fast inputs and compares the phase position of the signals
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!