B9: Zero Servo - YASKAWA GA800 Technical Reference

0 : Disabled
1 : Enabled
Standby Mode decreases how much power the drive consumes when it is in standby.
Standby Mode waits for the drive to stop, uses the relay output of an MFDO terminal to shut off the input side
electromagnetic contactor (MC), then shuts off the main circuit power supply.
Note:
These conditions are also necessary for Standby Mode:
• Connect an external 24 V power supply.
• Connect an electromagnetic contactor to the drive input side and connect the MFDO terminal set for H2-xx = 65 [Standby Output]. When
the MFDO terminal is OFF, the electromagnetic contactor must be OFF.
• Frequently starting and stopping the drive and regularly opening and closing the electromagnetic contactor will decrease the service life of
the drive.
A - Drive
B - MFDO Terminal
■
b8-51: Standby Mode Wait Time
No.
Name
(Hex.)
b8-51 Standby Mode Wait Time
(0B01)
◆

b9: Zero Servo

Zero Servo is a position control function that stops and holds the motor shaft. The drive safeties the stopped motor
and an external force will not move the motor.
When you enable the Zero Servo function, the drive will save the home position. The drive can correct the motor
position and put the motor into the home position when the load rotates the motor.
To enable Zero Servo, set H1-xx = 72 [MFDI Function Selection = Zero Servo]. The drive starts Zero Servo when the
MFDI terminal set for Zero Servo [H1-xx = 72] activates and the motor speed decreases to less than the value set in
b2-01 [DC Injection/Zero SpeedThreshold]. The drive stops and holds the motor in the Zero Servo start position.
When Zero Servo is enabled, the drive will hold the motor in position when the frequency reference increases to more
than the value set in b2-01. When Zero Servo is enabled, the drive will hold the motor in position when the frequency
reference increases to more than the value set in b2-01.
Note:
Zero Servo is available when A1-02 = 3, 7 [Control Method Selection = Closed Loop Vector, PM Closed Loop Vector].
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
V/f CL-V/f OLV CLV AOLV
Sets the delay time before turning off the electromagnetic contactor after the drive stops.
C - External 24 V power supply
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
12.3 b: Application
Default
(Range)
600 s
(0 - 6000 s)
12
767