5.3 Description of Function Codes
5-246
d77
Master follower operation (Synchronization completion detection angle)
d77 specifies the synchronization completion detection angle.
If the absolute value of the phase angle error (position deviation) between the master and follower PGs becomes
equal to or below the synchronization completion detection angle specified by d77, the inverter issues a
synchronization completed signal “SY”, provided that the E20, E21 or E27 data (Terminal function) is set to “29”
(Synchronization completed).
Once turned ON, the synchronization completed signal “SY” is kept ON for 100 ms.
360 degree of the detected angle is equivalent to 4 times d15.
Figure 5.3-29 Synchronization Completion Detection Signal “SY”
d78
Master follower control (Excessive error detection level )
d78 specifies the detection level for excessive error alarm (
ero
).
If the absolute value of the phase angle deviation (position deviation) between the master and follower PGs
exceeds 10 times the d78 setting, the inverter issues an alarm
ero
and shuts down its output.
During master-follower operation, the inverter always monitors an excessive deviation. The d78 setting should be
made taking into account that the deviation temporarily increases immediately after the start of running.
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