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At the beginning of a product interval, the function block determines the current position of the axis on which registration mark detection is running (except for "Mode" = +mcLENGTH_ONLY). The start can be detected based on a master position or an event.

For a fixed master reference, "TriggerInput.MasterInterval" can be used to define the length of a product cycle on the master side; "TriggerInput.IntervalLevel" can be used to define the starting position of the interval based on the master position.

If an event should be used to form the interval start, additional option +mcINTERVAL_EVENT for "Mode" must be used. The effects of the values of input structure "TriggerInput" are described in section Operating mode ("Mode").