Fuji Electric FRENIC-Ace series, Руководство пользователя

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5.3 Description of Function Codes
5-226
[ 8 ] Servo lock
J97 to J99 Servo lock (Gain, Completion timer, Completion range)
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Servo lock
The servo lock function is available only at vector control with speed sensor (F42=6). This function holds the motor
within the positioning completion range specified by J99 for the period specified by J98 even if an external force
applies to the motor.
Do not apply the frequent servo lock because the protection function for power cycle life may operate.
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Startup conditions of servo lock
Servo lock control starts when the following conditions are met:
F38 = 0
(Use actual speed as a decision criteria)
F38 = 1
(Use reference speed as a decision criteria)
1 Run command OFF, or Reference frequency < Stop frequency (F25)
2 “LOCK” (“Servo lock command”) ON (Assignment of “LOCK” (E01 to E05 data = 47))
3
The actual speed is less than the stop frequency
(F25).
The reference speed is less than the stop
frequency (F25).
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Operation examples
Servo-lock Not defined
OFF ON
Speed control
ON
ON OFF
OFF
LOCK
Control status
Gate
Stop frequency (F25)
Servo-lock Not defined
OFF
Detected speed (F38=0)
Reference speed (F38=1)
OFF
FWD / REV
Figure 5.3-21 Typical Control Sequence of servo lock
When the servo lock command is ON, the inverter keeps on outputting voltage on output terminals [U], [V] and
[W] even if a run command is OFF and the motor seems to be in stop state.
An electric shock may occur.
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Specifying servo lock control
Positioning completed signal -- “PSET” (E20, E21 and E27 data = 82), Servo lock (Completion timer) (J98), and
Servo lock (Completion range) (J99)
This output signal comes ON when the inverter has been servo locked so that the motor is held within the
positioning completion pulse counts specified by J99 and the timer specified with J98 has counted up.
• Data setting range J98: 0.000 to 1.000 (s) (Factory default is 0.100)
• Data setting range J99: 0 to 9999 (pulses) (Factory default is 10)