Siemens SINUMERIK 828D Commissioning Manual page 243

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Acknowledgment block [r/w]

Acknowledgment block n: The acknowledgment blocking bit assigned to task n.

If the bit is set via SINUMERIK Operate or from the PLC user program, the task is not acknowledged even when the

acknowledgment bit is set.

TRUE: Acknowledgment of the task blocked

FALSE: Acknowledgment of the task permitted

In this way, it is possible, for example, to incorporate a sensor in the PLC user program, which signals that the maintenance

task has been performed, and, if required, block the acknowledgment.

CNC commissioning

Commissioning Manual, 10/2015, 6FC5397-3DP40-5BA3

7.1 Interfaces in the PLC user program

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