Yaskawa Matrix Converter - Manual (Page 230)

Continuing Operation
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65
‹ Restarting Operation after Transient Fault (Auto-Restart Function)
If an MxC fault occurs during run, the MxC will perform a self-diagnosis. If no fault is detected, the MxC will
automatically restart. This is called the auto restart function.
Set the number of auto restarts in parameter L5-01. A fault reset is carried out every 5 ms after the minimum
baseblock time has passed. The counter counts the number of times that the operation is restarted after the
fault is reset. If the fault is not reset after executing the number of auto restarts set in L5-01, the protection
function will be activated.
The auto restart function can be applied to the following faults. If a fault not listed below occurs, the protec-
tion function will operate and the auto restart function will not.
„ Auto Restart External Outputs
To output auto restart signals externally, set H2-01 to H2-05 (Terminals M1-M2, P1-PC, P2-PC, P3-C3, and
P4-C4 Function Selection) to 1E (auto restart).
„ Related Parameters
„ Application Precautions
• The number of auto restarts count is reset under the following conditions:
After auto restart, normal operation has continued for 10 minutes.
After the protection operation has been performed, and the fault has been verified, and an fault reset
has been input.
After the power supply is turned off, and then on again.
• Do not use the auto restart function with variable loads.
• OC (Overcurrent) • OL1 (Motor overload)
• GF (Ground fault) • OH1 (Motor overheat)
• OV (Main circuit overvoltage) • OL3 (Overtorque)
• AOV (Main circuit overvoltage) • OL4 (Overtorque)
• LF (Output phase failure)
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
L5-01
Number of Auto
Restart Attempts
Sets the number of auto restart attempts.
Automatically restarts after a fault and con-
ducts a speed search from the run frequency.
0 to 10 0 No A A A
Num of Restarts
L5-02
Auto Restart Oper-
ation Selection Sets whether a fault contact output is acti-
vated during fault restart.
0: Not output (Fault contact is not activated.)
1: Output (Fault contact is activated.)
0 or 1 0 No A A A
Restart Sel