JUMO PCA Communications Software PCC (B 70.9702.0) - Manual (Page 49)

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6 Time Settings
Expanded (2)
Active ( ):
The scheduled times are calculated from the next valid
point, as if the PCC software had just made a read-out.
Inactive (
):
Data that have not yet been read out (from devices
where the scheduled time has passed) is read
immediately and then the scheduled times are
recalculated (see register for operating periods).