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• 3rd, 4th digit (RS-485 stopping method after communication error)
3rd digit
4th digit
Contents
0
0
Ramp stop by Bn-02, when RS-485 has communication error.
0
1
Coast to stop, when RS-485 has communication error.
1
0
Ramp stop by Bn-04, when RS-485 has communication error.
1
1
Operation to continue (will stop if the key stop is pressed)
Please Refer to Appendix C for a detailed discussion of Serial Communications.
(9) Operation Mode Select 6 (Sn-09)
•
1st, 2nd digit
(Not used)
•
3rd digit
(energy-savings function selection)
3rd digit = 0:
Energy-savings function is ineffective and operation is performed with normal
V/f control.
3rd digit = 1:
Energy-savings function is effective.
•
4th digit
(Not used)
(10) Protective Characteristics Select 1 (Sn-10)
•
1st digit
(selection of stall prevention during acceleration)
1st digit = 0:
Stall prevention during acceleration is enabled.
1st digit = 1:
Stall prevention during acceleration is not enabled.
The function of stall prevention during acceleration automaticaIly extends acceleration
according to the load status (AC drive output current) thus preventing the motor from stalling
during acceleration. The stall prevention level during acceleration is determined as follows:
Acceleration stall
acceleration stall
maximum voltage
prevention level of
=
prevention level (Cn-28)
x
frequency (Cn-04)
constant output field
output frequency
When the 1st digit of Sn-10 is 1, the output frequency increases at the rate determined by the
acceleration time:
•
2nd digit
(selection of stall prevention during deceleration)
2nd digit = 0:
Stall prevention during deceleration is enabled.
2nd digit = 1:
Stall prevention during deceleration is not enabled.
The function of stall prevention during deceleration automatically extends deceleration
time according to the magnitude of the DC Bus voltage, thus preventing overvoltage
during deceleration.
2-42
PA 7300
PART II: OPERATION MANUAL
Summary of Contents for PA7300 Series
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