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PLC commissioning
5.4 Creating a PLC program
The system constant with the data type "Hw_Interface" contains the HW identifier of the DP-
Integrated interface on the NCK (initiating module for NCK events).
5.4.7.6
Assigning hardware interrupt OB during runtime
In special applications (e.g. modular machine) it probably makes sense not to select the
hardware interrupt OB in the project in the NCK events, but during the runtime in the user
program using an attach command instead.
● In the assigned hardware interrupt OB the block "LBP_NCKProcessIRT [FC3]" must be
called in exactly the same way as when you define the hardware interrupt OB in the
configuration.
● The assignment must take place in the user program before the call of the NCK hardware
interrupt, i.e. before the call of a quick auxiliary function, for example
● The assignment of the hardware interrupt OB during runtime is not saved in the project data.
The assignment must take place in the user program after each STOP-RUN transition of the
PLC.
Note
Message: "Wait: AuxF acknowledgment missing"
If NCK events, auxiliary functions or NCK hardware interrupts are called without a hardware
interrupt OB being assigned or before one is assigned, the channel message "Wait: AuxF
acknowledgment missing" is issued.
You can only leave this state if you trigger a "Power On Reset" of the MCU.
94
MCU commissioning: NC, PLC, Drive
Commissioning Manual, 02/2020, A5E47437618B AB
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