• When the main circuit intermediate voltage exceeds limitation level, the output frequency is control-
led so that the main circuit intermediate voltage is lowered.
• The regeneration capacity of an inverter can be made use of to shorten the deceleration time.
•
When “Main Circuit DC Voltage control with forced stop after three times deceleration time has
passed” has been set, anti-regenerative control is suspended and the motor is stopped according to
the selected deceleration time when a time three times of the currently selected deceleration time
elapses after the RUN command is turned OFF. Use this function when the load state causes the
output frequency to rise by anti-regenerative control and the motor does not stop.
8-8-3
Instantaneous Overcurrent Limitation
• This function is used to select whether to perform the current limitation process (a process where
the inverter output is momentarily turned OFF to suppress an increase in the current, and the output
frequency is operated) or overcurrent tripping when the output current of the inverter becomes equal
to or above the instantaneous overcurrent limitation level.
•
If the torque generated by the motor is temporarily reduced due to the current limitation process,
and a failure occurs for the use of the equipment or machinery
, it is necessary to perform overcur-
rent tripping and use a mechanical brake.
• During instantaneous current limitation operation, Inverter output limiting signal (5: IOL), (22: IOL2)
is output.
Parameter No. Function name Data
Default da-
ta
Unit
3008Hex-0DHex
Instantaneous Overcurrent Lim-
iting Function Selection
0: Disable
1: Enable
1 -
3005Hex-15Hex/
3005Hex-1CHex
Output Terminal [DO1] Function
Selection/
Output T
erminal [ROA, ROB]
Function Selection
5: IOL (Inverter output limit-
ing)
22: IOL2 (Inverter output
limiting with delay)
- -
8-8-4
External Trip (EXT)
Use this signal to have the inverter trip via an error signal generated by a peripheral system. To do so,
allocate “9: EXT (External trip)” to Input Terminal [DI1] to [DI7] Function Selection (3005Hex-02Hex to
3005Hex-06Hex, 3005Hex-63Hex, 3005Hex-64Hex).
When the EXT terminal turns OFF
, the inverter trips and generates the external alarm (alarm code:
12), and shuts off its output.
Once the inverter trips and generates the external alarm (alarm code: 12), the trip status will not be
reset even if the error signal from external equipment is reset (the EXT terminal is turned ON).
In this case, perform the reset operation or cycle the power supply to reset the trip. For details on a
reset operation, refer to Reset on page 6-59.
Parameter No. Function name Data
Default da-
ta
Unit
3005Hex-02Hex to
3005Hex-06Hex,
3005Hex-63Hex,
3005Hex-64Hex
Input Terminal [DI1] to [DI7]
Function Selection
9: EXT (External trip) - -
8 Other Functions
8-76
M1 Series EtherCAT Type User’s Manual (I670)
To Next Page
Loading...
Need help?
General