Control By Monitoring The Switching Speed Through Speed References And The Servopack's Speed Feedback - YASKAWA E-V-SD Series User Manual

5 Spindle Axis Operation

5.6.8 Control by Monitoring the Switching Speed through Speed References and the SERVOPACK's Speed Feedback

3.
The high-speed winding request (SVCMD_IO.WND_CHG = 0) and high-speed winding gain
selection (SVCMD_IO.G-SEL) are executed simultaneously.
The SERVOPACK performs the winding selection sequence,
SVCMD_IO.WND_MOD = 0 to show the high-speed winding status after execution of the winding
selection operation has been completed.
∗
4.
The host controller checks to confirm that SVCMD_IO.WND-MOD is 0.
5.
The host controller checks to confirm that the speed matches (SVCMD_IO.V_CMP = 1).
This concludes the winding selection sequence to change from the low-speed winding to high-speed
winding.
• Changing from High-speed Winding at 2,000 min
1.
If an S reference is specified for the current winding, the speed of the S reference is executed.
2.
The speed feedback (FSPD) is read from the SERVOPACK and a check is made to confirm that
it is lower than the switching speed - ΔS.
3.
The low-speed winding request (SVCMD_IO.WND_CHG = 1) and low-speed winding gain
selection (SVCMD_IO.G-SEL) are executed simultaneously.
The SERVOPACK performs the winding selection sequence, and then returns SVCMD_IO.WND_MOD
= 1 to show the low-speed winding status after execution of the winding selection operation has been
completed.
4.
The host controller checks the low-speed winding state (SVCMD_IO.WND_MOD = 1) from the
SERVOPACK.
5.
The host controller checks to confirm that the speed matches (SVCMD_IO.V_CMP = 1).
This concludes the winding selection sequence to change from the high-speed winding to low-speed
winding.
5.6.8
Control by Monitoring the Switching Speed through Speed References and
the SERVOPACK's Speed Feedback
This method uses the speed reference and SERVOPACK feedback speed to determine if the speed reference
and actual motor speed are in the high-speed or the low-speed winding selection range and select the appropri-
ate winding.
Compared to performing this selection based only on the actual feedback speed, this method requires less
switching of the magnetic contactor.
Winding Selection Sequence
SVCMD_IO.WND_CHG
Selection processing (servo driver processing)
SVCMD_IO.WND_MOD
5-30
The SERVOPACK takes the differential of the winding selection signal and starts the selection sequence if any
changes are detected.
After entering the SV_OFF state and a base block is set, the output to the magnetic contactor for winding selec-
tion is changed to high-speed winding after 10 ms.
In the control section, load the gain settings for the selected G-SEL and set for high-speed winding.
Make sure that the magnetic contactor for winding selection is actually set for high-speed winding.
This removes the base block and changes to the SV_ON state.
500 min
Speed reference
0
Speed
0
-1
to Low-speed Winding at 500 min
S2000 M05 M03
-1
2000 min
-1
∆S
*
and then returns
-1
S500
-1
500 min
∆S