2.7 F: Options
320 YASKAWA TOEPYAIGA8002B GA800 Drive Programming
After you set the number of gear teeth, the drive uses this formula to calculate the motor speed:
Note:
When F1-12 = 0 or F1-13 = 0, the gear ratio is 1.
■ F1-13: Encoder 1 Gear Teeth 2
No.
(Hex.)
Name Description
Default
(Range)
F1-13
(038C)
Encoder 2 Gear Teeth 1
Sets the number of gear teeth on the load side. This parameter and F1-12 [Encoder 1 Gear Teeth 1]
set the gear ratio between the motor and encoder.
0
(0 - 1000)
After you set the number of gear teeth, the drive uses this formula to calculate the motor speed:
Note:
When F1-12 = 0 or F1-13 = 0, the gear ratio is 1.
■ F1-14: Encoder Open-Circuit Detect Time
No.
(Hex.)
Name Description
Default
(Range)
F1-14
(038D)
Encoder Open-Circuit Detect
Time
Sets the length of time that the drive must not receive a pulse signal to cause PGo [Encoder (PG)
Feedback Loss].
2.0 s
(0.0 - 10.0 s)
If the drive does not detect output pulses from the encoder for longer than the time set in F1-14, the drive will detect
PGo.
Note:
Motor speed and load conditions can cause ov [Overvoltage] and oC [Overcurrent] faults.
■ F1-18: Deviation 3 Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
F1-18
(03AD)
Deviation 3 Detection
Selection
Sets the number of rotations necessary to detect conditions that invert the torque reference and rate of
acceleration and cause dv3 [Inversion Detection].
10
(0 - 10)
When the drive detects these two conditions at the same time for the number of times set in F1-18, the drive will
detect dv3.
• The torque reference and acceleration are in opposite directions. For example, torque reference is in forward run
and the acceleration is in a negative direction.
• The difference between the speed reference and the actual motor speed is more than 30%.
Note:
• Reference the setting value for E5-11 [Encoder Z-Pulse Offset] and the δθ value found on the motor nameplate. A usual cause for a dv3
fault is an incorrect E5-11 setting.
• Set F1-18 = 0 to disable the function.
■ F1-19: Deviation 4 Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
F1-19
(03AE)
Deviation 4 Detection
Selection
Sets the number of pulses necessary to cause dv4 [Inversion Prevention Detection].
128
(0 - 5000)
The drive detects a dv4 [Inversion Prevention Detection] faultwhen the pulses in a reverse direction to the speed
reference are input for longer than the time set in F1-19.
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