YASKAWA
SIEPC71061737B GA800 Drive Technical Reference
709
A - Drive
B - MFDO Terminal
C - External 24 V power supply
■
b8-51: Standby Mode Wait Time
No.
(Hex.)
Name
Description
Default
(Range)
b8-51
(0B01)
Standby Mode Wait Time
Sets the delay time before turning off the electromagnetic contactor after the drive stops.
600 s
(0 - 6000 s)
◆
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]
.
Figure 12.43 Zero Servo Time Chart
Monitor
U6-22 [ZeroServoPulse Move]
shows the difference between the position of the motor shaft and the Zero
Servo start position when Zero Servo is enabled. To find the difference, divide the number of pulses shown in
U6-22
by 4.
When the position of the motor shaft is in the range of
“
Zero Servo start position ±
b9-02 [Zero Servo Completion
Window]
”
, the drive will activate an MFDO set for
Zero Servo Complete [H2-xx = 33]
.
NOTICE:
Do not let the Zero Servo function hold 100% load for long periods of time. When the application must use Zero Servo to
hold 100% load for long periods, operate in less than 50% of the drive rated output current or use a larger capacity drive. If Zero
Servo holds the load for too long in 50% or more of the drive rated output current, it will cause damage to the drive.
V/f
CL-V/f
OLV
CLV
AOLV
OLV/PM
OLV/PM AOLV/PM CLV/PM
EZOLV
Содержание GA800 Series
Страница 2: ...This Page Intentionally Blank 2 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 20: ...i 3 Warranty Information 20 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 30: ...1 3 Features and Advantages of Control Methods 30 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 58: ...2 9 Installation Methods 58 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 144: ...4 4 Start up Procedures 144 YASKAWA SIEPC71061737B GA800 Drive Technical Reference Figure 4 8 Basic Steps before Startup...
Страница 268: ...5 6 Safe Disable Input 268 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 306: ...6 3 MEMOBUS Modbus Communications 306 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 370: ...7 10 Troubleshooting Without Fault Display 370 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 426: ...8 7 Storage Guidelines 426 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...