Specifications

Parameters/address space
4.1 Parameter
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 04/2015, A5E03485935-AE
21
Comparison value
With this parameter you specify the count value at which the digital output DQ (STS_DQ bit
of the feedback interface) switches due to the selected comparison event.
Start value
With this parameter, you specify the value at which counting begins and is continued if
defined events occur. The following condition must be met:
Low counting limit < = start value < = high counting limit.
Behavior when a counting limit is exceeded
With this parameter, you specify the behavior if a counting limit is exceeded.
Behavior
Meaning
Stop counting After a counting limit is exceeded, the counting procedure is aborted and the
STS_GATE bit (internal gate) is reset.
To restart the counting, the SW_GATE bit must be reset via the control inter-
face and set again.
Continue counting
After a counting limit is exceeded, the counted value is set to the other counting
limit and counting is continued.