Siemens FM452 outputs flicker for one cycle

Kataeb

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when the operator (hmi) changes (slightly) the Begin or End data on the FM452 Siemens module, the cam outputs flicker for one cycle. how can we avoid this?

6ES7452-1AH00-0AE0
SIMATIC S7-400, FM 452 ELECTRONIC CAM CONTROLLER INCL. CONFIG. PACKAGE ON CD
 

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