Siemens SIMATIC ET 200AL, System Manual

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Counting
4.1 Configuration method 2xCount
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Equipment Manual, 08/2021, A5E38688112-AD
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4.1.2.2 Explanation of the parameters
General parameters
Diagnostics: Missing load voltage 2L+
Enabling of the diagnostics for missing or insufficient load voltage 2L+.
Diagnostics: Short circuit to ground
Enabling of the diagnostics, at short-circuit of an encoder supply or of an output to ground.
Behavior at CPU/master STOP (8...15)
With this parameter you set the reaction of the digital outputs of after a CPU/master STOP.
Behavior DQ at freely assignable Channels 8...15:
•
Deactivate: The digital output is de-energized.
• Keep last value: The last value of the digital output remains activated.
• Output substitute value: The digital output outputs a configured substitute value.
Parameter counting function
Input delay DI
This parameter can be used to suppress signal faults. Changes to the signal are only detected
if they are constantly pending longer than the set input delay time.
Note
Influences the counting frequency
When setting the input delay take into account that the counting frequency possible is
automatically reduced at higher values.
In order to achieve the maximum counting frequency of 2 kHz select an input delay smaller
than 0.4 ms.
Counting direction
Use this parameter to select the direction in which counting is carried out:
•
Forward
• Backward.
Note
If you have parameterized DI
5
or DI
7
as the direction input in the respective counter, this
parameter is ineffective.