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13. 14. 2 External synchronization
An external synchronization to calculate the 3
highest mean values can be carried out
• via the digital output 3 (e.g. via a pulse
transducer) or
• via a Modbus command
Scenarios of external synchronization:
"No pulse despite setting"
If no pulse occurs via the digital output 3 or a
Modbus command, the measurement values
are saved as they are in an internal synchro-
nization - but on the minute!
Fig.: Principle of synchronization with
"No pulse despite setting"
Capture time Capture time Capture time Capture time
Time base Time base Time base
Pulse curve for the digital input 3
Principle of synchronization
Example Maximum value Value Time
stamp
Effective current L1 Drag indicator 1 3.51 A 09:13:07
Effective current L1 Drag indicator 2 2.52 A 09:08:07
Effective current L1 Drag indicator 3 1.52 A 09:03:07
Fig. Example of drag indicator saving with
time stamp (with a set time base of 5 min)
"One pulse"
If the device receives a single pulse or a
Modbus command outside the capture time,
the measurement values that have been
totaled up to that point for the calculation of
the mean value and the time are reset. The
time point is redefined as a relative null point
and a recalculation is carried out!
Fig.: Principle of synchronization with
"a pulse outside the capture time"
Capture time Capture time Capture time Capture time
Time base Time base Time base
Pulse curve for the digital input 3
Principle of synchronization
Resynchronization
Relative
zero point
Time base Time base Time base
Example:
Example Maximum value Value Time
stamp
Effective power L1
Drag indicator
Ref. 1
396.73 W 09:18:47
Effective power L1
Drag indicator
Ref. 2
207.34 W 09:13:47
Effective power L1
Drag indicator
Ref. 3
80.59 W 09:08:47
Fig. Example of drag indicator saving with
time stamp (with a set time base of 5 min)
Power increases as the time runs. The values
are set back to 0 by the pulse (09:06:47)
outside the capture time A new totaling of
the interim values starts at that time point.
Because no further pulse arrives, the mean
value is calculated after the set time (time
base).