Siemens SIMATIC ET 200SP Manual page 65

Hardware interrupt
Synchronization of the counter by an external signal
Direction reversal
Can only be configured in Counting mode
1)
The feedback bit STS_DIR has the default value "0". A hardware interrupt is not triggered when
2)
the first counter value is changed immediately after switching on the technology module in the
down direction
You can activate any combination of events to trigger hardware interrupts.
Technology Module TM Count 1x24V (6ES7138-6AA00-0BA0)
Manual, 02/2017, A5E33002339-AB
2)
.
Interrupts/diagnostic messages
5.3 Hardware interrupts
EventType number
9
10
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