Explanation Of The Parameters Of The Counting Mode - Siemens Simatic ET 200MP Manual
Digital input module (6es7521-1bl00-0ab0)
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4.1.4
Explanation of the parameters of the Counting mode
Missing supply voltage L+
Enabling of the diagnostics, with missing or too little supply voltage L+.
Wire break
Enabling diagnostics if the line to the encoder is interrupted.
Input delay
This parameter can be used to suppress signal disruptions. Changes to the signal are only
detected if they are constantly pending longer than the set input delay time.
Hardware interrupt
Specifies whether or not a hardware interrupt is generated by the event "Comparison event
occurred for DQ" (rising edge at STS_DQ).
Set output DQ
With this parameter, you specify the behavior of the STS_DQ bit in the feedback interface.
You can assign this bit in the user program, for example, with a hardware output, see
Address space Counting mode (Page 26).
Behavior
Between a
comparison value and the high count-
ing limit
Between a
comparison value and the low counting
limit
Edge selection
With this parameter you specify which edge is used to count.
You can select the following options:
● On rising edge
● On falling edge
● On rising and falling edge
High counting limit
With this parameter you limit the counting range. You can enter a value up to 4294967295
(2
32
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF
- 1).
Meaning
STS_DQ bit is set if the following condition is met:
Comparison value < = counted value < = high counting limit
STS_DQ bit is set if the following condition is met:
Low counting limit < = counted value < = comparison value
Parameters/address space
4.1 Parameter
19
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