Siemens SIMATIC S7-1500 Manual page 16

Measuring input
If you use Position input for Motion Control (Page 18), you can use the "Measuring input"
technology object to execute a measuring input function with a hardware digital input.
Hardware interrupts
The technology module can trigger a hardware interrupt in the CPU when a comparison
event, zero crossing and/or direction reversal occurs. You can specify which events during
operation are to trigger a hardware interrupt.
Technology module TM PosInput 2 (6ES7551-1AB00-0AB0)
Manual, 06/2018, A5E03982218-AB
Product overview
2.2 Functions
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