Yaskawa G5 Electronic Lineshaft Alignment - Manual (Page 6)

Electronic Lineshaft with Alignment
Date: 07-01-04, Rev: 04-07 Page 6 of 15 TM.G5SW.046
1024 pulse encoder with a 4096 quadrature encoder count. The sign is determined in respect to the master
trigger switch.
Alignment is when both master and slave triggers are activated simultaneously. If the trigger switches are not
aligned properly the align offset can be used to correct the error. A negative offset indicates the slave drive
needs to retard. A positive offset indicates the slave drive needs to advance.
A minus offset value is indicative of the slave trigger occurring before the master resulting in the need to retard
the drive by the negative offset count set in P1-02. A positive value indicates the slave trigger occurs after the
master resulting in the need to advance the drive.
Alignment Timing Chart
Chart Explanation:
The slave drive is set to run. The master driver is set to run. The slave follows the master drive. The align slave
input is activated and maintained. Both master and slave triggers are activated simultaneously. No alignment
error is accumulated and no correction in alignment is made.
The master trigger is activated. The alignment error begins to accumulate. The slave trigger is activated. The
alignment error accumulation stops. The alignment error is corrected by accelerating the slave drive because the
master was leading the slave. Both triggers are deactivated.
The slave trigger is activated. The alignment error begins to accumulate. The master trigger is activated. The
alignment error accumulation stops. The alignment error is corrected by decelerating the slave drive because the
slave was leading the master. Both triggers are deactivated.
The “Aligned Output” will activate when the slave drive has corrected the position error to within 50 encoder
counts. It will not reset until the “Slave Run” input has been removed or the “Align Slave” input has been removed
and reactivated.
Slave Run
Input Term #1
Master Run
Input Term #1
Aligned
Output
Master Trigger
Input
Slave Trigger
Input
Align Slave
Input
Alignment
Error
Slave Freq
Output
Master Freq
Output