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The function block SAMPLETM is used to enable some logic (e.g. the PID function block) in dedicated time intervals. This was necessary with the Concept Low End CPUs because these CPUs don't allow to use interrupt sections. Concept High End CPUs (434, 534) and Unity CPUs allow time interrupt sections and Fast Tasks.
Therefore, it is not necessary to use the SAMPLETM block when using Concept High End CPUs (434, 534) and Unity CPUs