Specifications

x
Speed Limit (Frequency Reference Limit Function)...................................6-30
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Limiting Maximum Output Frequency........................................................................... 6-30
" Limiting Minimum Frequency ....................................................................................... 6-31
Improved Operating Efficiency ...................................................................6-32
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Reducing Motor Speed Fluctuation (Slip Compensation Function).............................. 6-32
" Compensating for Insufficient Torque at Startup and Low-speed Operation
(Torque Compensation)................................................................................................ 6-35
" Hunting-prevention Function ........................................................................................ 6-37
" Stabilizing Speed (Speed Feedback Detection Function) ............................................ 6-38
Machine Protection ....................................................................................6-39
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Reducing Noise and Leakage Current ......................................................................... 6-39
" Limiting Motor Torque (Torque Limit Function) ............................................................ 6-42
" Preventing Motor Stalling During Operation ................................................................. 6-44
" Changing Stall Prevention Level during Operation Using an Analog Input .................. 6-45
" Detecting Motor Torque................................................................................................ 6-45
" 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 ................................................................................. 6-56
Continuing Operation .................................................................................6-57
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Restarting Automatically After Power Is Restored........................................................ 6-57
" Speed Search............................................................................................................... 6-59
" Continuing Operation at Constant Speed When Frequency Reference Is Lost ........... 6-65
" Restarting Operation After Transient Error (Auto Restart Function) ............................ 6-66
Drive Protection..........................................................................................6-67
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Performing Overheating Protection on Mounted Braking Resistors............................. 6-67
" Reducing Drive Overheating Pre-Alarm Warning Levels ............................................. 6-68
Input Terminal Functions............................................................................6-69
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Temporarily Switching Operation between Digital Operator and Control Circuit
Terminals...................................................................................................................... 6-69
" Blocking Drive Outputs (Baseblock Commands) ......................................................... 6-70
" Stopping Acceleration and Deceleration (Acceleration/Deceleration Ramp Hold)....... 6-71
" Raising and Lowering Frequency References Using Contact Signals (UP/DOWN) .... 6-72
" Accelerating and Decelerating Constant Frequencies in the Analog References
(+/- Speed) ................................................................................................................... 6-75
" Hold Analog Frequency Using User-set Timing ........................................................... 6-76
" Switching Operations between a Communications Option Card and Control Circuit
Terminals...................................................................................................................... 6-76
" Jog Frequency Operation without Forward and Reverse Commands (FJOG/RJOG) . 6-77
" Stopping the Drive by Notifying Programming Device Errors to the Drive
(External Fault Function).............................................................................................. 6-78