VI
Torque Compensation for Sufficient Torque at Start
and Low-speed Operation .............................................................................. 6-28
Hunting-Prevention Function.......................................................................... 6-29
Machine Protection .................................................................................... 6-30
Preventing Motor Stalling During Operation ................................................... 6-30
Detecting Motor Torque .................................................................................. 6-31
Motor Overload Protection ............................................................................. 6-33
Motor Overheating Protection Using PTC Thermistor Inputs ......................... 6-35
Limiting Motor Rotation Direction and Output Phase Rotation....................... 6-37
Automatically Restart ................................................................................. 6-38
Restarting Automatically After Momentary Power Loss ................................. 6-38
Speed Search ................................................................................................ 6-39
Continuing Operation at Constant Speed When Frequency
Reference Is Lost ........................................................................................... 6-44
Restarting Operation After Transient Error (Auto Restart Function)............... 6-45
Inverter Protection ...................................................................................... 6-47
Inverter Overheat Protection .......................................................................... 6-47
Input Phase Loss Detection Level.................................................................. 6-47
Ground Fault Protection ................................................................................. 6-48
Cooling Fan Control ....................................................................................... 6-48
Setting the Ambient Temperature................................................................... 6-49
OL2 Characteristics at Low Speed................................................................. 6-49
Soft CLA Selection ......................................................................................... 6-50
Input Terminal Functions ............................................................................ 6-51
Temporarily Switching Operation between Digital Operator
and Control Circuit Terminals ......................................................................... 6-51
Blocking Inverter Outputs (Baseblock Commands)........................................ 6-52
Multifunction Analog Input A2 Disable/Enable ............................................... 6-52
Drive Enable/Disable...................................................................................... 6-53
Bypass Drive Enable ...................................................................................... 6-53
Stopping Acceleration and Deceleration
(Acceleration/Deceleration Ramp Hold) ......................................................... 6-53
Raising and Lowering Frequency References Using Contact Signals
(UP/DOWN).................................................................................................... 6-55
Trim Control Function (+/– Speed) ................................................................. 6-58
Hold Analog Frequency Using User-set Timing ............................................. 6-59
Switching Operation Source to Communication Option Card ........................ 6-60
Switching Operation Source to MEMOBUS communication .......................... 6-60
AUTO/HAND Mode Switching by Digital Input ............................................... 6-61
Jog Frequency Operation without Forward and Reverse Commands
(FJOG/RJOG) ................................................................................................ 6-61
Stopping the Inverter on External Device Errors (External Error Function).... 6-62
Output Terminal Functions ......................................................................... 6-63
Monitor Constants ...................................................................................... 6-66
Using the Analog Monitor Constants.............................................................. 6-66
Individual Functions ................................................................................... 6-68
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