5.3 Description of Function Codes 5.3.9 d codes (Applied functions 2)
Start after synchronization operation
Start after synchronization operation (d41 = 3) involves control which ensures that each Z-phase matches bases
on the initially detected master side and follower side Z-phase (position) after operation starts. At this time, the
follower side is delayed by a maximum of 1 rotation when starting up (start after synchronization operation). Once
start after synchronization is complete, start after synchronization operation is never performed again provided that
master-follower operation (Note 1) is not canceled.
By changing the function code d76 setting, the Z-phase synchronization angle with the master side and follower
side can be adjusted.
The follower side speed and position are controlled to ensure master side position and follower side position are
added up inside the inverter, and the difference (hereinafter referred to as deviation) is always 0.
If a miscount occurs due to such reasons as noise in the total A/B phase count, error correction is performed based
on the phase difference for the Z-phase.
If the deviation reaches the synchronization complete detection angle (function code d77) or lower, an “SY”
synchronization complete signal is output.
If synchronization shifts, and the deviation exceeds the set deviation overflow detection value (10 times function
code d78), an error alarm occurs, and output is shut off.
t
t
t
t
t
t
Reference PG
rotation speed
Run command
for slave motor
Slave PG
rotation speed
Reference PG
phase angle
Slave PG
phase angle
SY
output
Synchronization completedStart of standby
Note: Master-follower operation cancellation conditions
Master-follower operation is canceled in the following cases.
• When the follower side run command turns OFF
• When the “BX” coast to stop command turns ON, and the “STOP” forced stop command turns ON
• When an alarm occurs
• When switching to independent operation (realized by switching between F01 and C30 using “Hz2/Hz1” terminal)
• During torque control, during operation with commercial power supply
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