Improved Operating Efficiency ...................................................................6-32 ‹ Reducing Motor Speed Fluctuation (Slip Compensation Function) ..............................6-32 ‹ Compensating for Insufficient Torque at Startup and Low-Speed Operation (Torque Compensation) ................................................................................................6-34 ‹ Hunting-Prevention Function ........................................................................................6-36 ‹ Stabilizing Speed (Speed Feedback Detection Function) ............................................6-37 Machine Protection.....................................................................................6-38 ‹ Reducing Noise and Leakage Current..........................................................................6-38 ‹ Limiting Motor Torque (Torque Limit Function).............................................................6-40 ‹ Stall Prevention during Run ..........................................................................................6-43 ‹ Changing Stall Prevention Level during Run Using an Analog Input............................6-44 ‹ Using Frequency Detection:
L4-01 to L4-05.................................................................6-44 ‹ Detecting Motor Torque ................................................................................................6-48 ‹ Changing Overtorque and Undertorque Detection Levels Using an Analog Input .......6-50 ‹ Motor Overload Protection............................................................................................6-51 ‹ Setting Motor Protection Operation Time .....................................................................6-53 ‹ Motor Overheating Protection Using PTC Thermistor Inputs .......................................6-54 ‹ Limiting Motor Rotation Direction..................................................................................6-55 Continuing Operation..................................................................................6-56 ‹ Restarting Automatically after Power is Restored ........................................................6-56 ‹ Speed Search...............................................................................................................6-59 ‹ Continue Running after Frequency Reference Loss.....................................................6-64 ‹ Restarting Operation after Transient Fault (Auto-Restart Function).............................6-65 MxC Protection...........................................................................................6-66 ‹ Reducing MxC Overheating Pre-Alarm Warning Levels...............................................6-66 Input Terminal Functions ............................................................................6-67 ‹ Temporarily Switching Operation between Digital Operator and Control Circuit Terminals...............................................................................................6-67 ‹ Blocking MxC Outputs (Baseblock Commands)...........................................................6-68 ‹ Stopping Acceleration and Deceleration (Accel/Decel Ramp Hold) .............................6-69 ‹ Raising and Lowering Frequency References Using Contact Signals (UP/DOWN).....6-70 ‹ Accelerating and Decelerating Parameter Frequencies in the Analog References (+/- Speed)....................................................................................................................6-73 ‹ Hold Analog Frequency Using User-set Timing............................................................6-74 ‹ Switching Operations between a Communications Option Board and Control Circuit Terminals........................................................................................6-74 ‹ Jog Frequency Operation without Forward and Reverse Commands (FJOG/RJOG)..6-75 ‹ Stopping the MxC by Notifying Programming Device Errors to the MxC (External Fault Function) ..............................................................................................6-76 Output Terminal Functions..........................................................................6-77 Monitor Parameters....................................................................................6-79 ‹ Using the Analog Monitor Parameters..........................................................................6-79 xiii