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When the 2nd digit of Sn-10 is 1, the output frequency decreases at the rate determined by
the deceleration time. For positioning applications, specify “stall prevention during deceleration
not provided” (2nd digit = 1) in order to obtain stopping accuracy. With large load inertia, use
a braking resistor (For 460V: 5HP~30HP and 230V: 5HP~25HP and 600V: 5~25HP) or braking
transistor with braking resistor to prevent overvoltage.
•
3rd digit
(stall prevention during run)
3rd digit = 0:
Stall prevention during run is enabled.
3rd digit = 1:
Stall prevention during run is not enabled.
Stall prevention operation during run starts decelerating when the output current is greater
than the set value of Cn-30 (operation level of stall prevention during running) for more than
100msec. The AC drive decelerates as long as the output current exceeds the set value of Cn-30.
When the output current goes below the set value, the AC drive reaccelerates. The deceleration
time selected in the 4th digit of Sn-10 is used. Even during stall prevention while running,
stall prevention during deceleration and stall prevention during acceleration are enabled.
•
4th digit
(selection of deceleration time during stall prevention during run)
4th digit = 0:
The AC drive decelerates for the time specified in bn-02.
4th digit = 1:
The AC drive decelerates for the time specified in bn-04.
(11) Protective Characteristics Select 2 (Sn-11)
•
1st digit
(Not used)
*
2nd digit
(fault contact signal during auto reset/restart operation)
2nd digit = 0:
A fault contact signal is not asserted during auto reset/restart operation.
2nd digit = 1:
A fault contact signal is asserted during auto reset/restart operation.
2-43
PA 7300
PART II: OPERATION MANUAL
OUTPUT
FREQUENCY
DECELERATION TIME
ACCELERATION
TIME
HYSTERESIS
2%
DETECTION LEVEL OF
STALL PREVENTION
DURING RUN
RETURN LEVEL
AC DRIVE OUTPUT
CURRENT
DETECTION TIME: 100ms
STALL PREVENTION DURING RUN
Summary of Contents for PA7300 Series
Page 9: ......
Page 10: ...PART I INSTALLATION MANUAL ...
Page 44: ...PART II OPERATION MANUAL ...
Page 107: ...2 57 PA 7300 PART II OPERATION MANUAL REDUCTION COEFFICIENT ...
Page 116: ...2 66 PA 7300 PART II OPERATION MANUAL 2 5 Monitoring Peramiters UN ...
Page 117: ...2 67 PA 7300 PART II OPERATION MANUAL ...
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Page 154: ...5100 N IH 35 Round Rock Texas 78681 USA 1 800 279 4007 www tecowestinghouse com ...