xiv
Adjusting Frequency References ............................................................... 6-35
îš‹
Adjusting Analog Frequency References ..................................................................... 6-35
îš‹ Operation Avoiding Resonance (Jump Frequency Function)....................................... 6-38
îš‹ Adjusting Frequency Reference Using Pulse Train Inputs........................................... 6-40
Speed Limit (Frequency Reference Limit Function) ................................... 6-41
îš‹
Limiting Maximum Output Frequency........................................................................... 6-41
îš‹ Limiting Minimum Frequency ....................................................................................... 6-41
Improved Operating Efficiency ................................................................... 6-43
îš‹
Reducing Motor Speed Fluctuation (Slip Compensation Function) .............................. 6-43
îš‹ Compensating for Insufficient Torque at Startup and Low-speed Operation
(Torque Compensation)................................................................................................ 6-45
îš‹ Hunting-prevention Function ........................................................................................ 6-47
îš‹ Stabilizing Speed (Speed Feedback Detection Function) ............................................ 6-48
Machine Protection .................................................................................... 6-49
îš‹
Limiting Motor Torque (Torque Limit Function) ............................................................. 6-49
îš‹ Preventing Motor Stalling During Operation ................................................................. 6-52
îš‹ Changing Stall Prevention Level during Operation Using an Analog Input .................. 6-53
îš‹ Using Frequency Detection .......................................................................................... 6-53
îš‹ Detecting Motor Torque ................................................................................................ 6-56
îš‹ Changing Overtorque and Undertorque Detection Levels Using an Analog Input ....... 6-59
îš‹ Motor Overload Protection ........................................................................................... 6-60
îš‹ Setting Motor Protection Operation Time ..................................................................... 6-62
îš‹ Motor Overheating Protection Using PTC Thermistor Inputs ....................................... 6-63
îš‹ Limiting Motor Rotation Direction ................................................................................. 6-65
Continuing Operation ................................................................................. 6-66
îš‹
Restarting Automatically After Power Is Restored........................................................ 6-66
îš‹ Speed Search............................................................................................................... 6-67
îš‹ Continuing Operation at Constant Speed When Frequency Reference Is Lost ........... 6-74
îš‹ Restarting Operation After Transient Fault (Auto Restart Function)............................. 6-74
Inverter Protection...................................................................................... 6-76
îš‹
Performing Overheating Protection on Mounted Braking Resistors............................. 6-76
îš‹ Reducing Inverter Overheating Pre-Alarm Warning Levels ......................................... 6-77
Input Terminal Functions ............................................................................ 6-78
îš‹
Temporarily Switching Operation between Digital Operator and Control Circuit
Terminals ...................................................................................................................... 6-78
îš‹ Blocking Inverter Outputs (Baseblock Commands)...................................................... 6-79
îš‹ Stopping Acceleration and Deceleration (Acceleration/Deceleration Ramp Hold) ....... 6-80
îš‹ Raising and Lowering Frequency References Using Contact Signals (UP/DOWN) .... 6-81
îš‹ Accelerating and Decelerating Constant Frequencies in the Analog References
(+/- Speed).................................................................................................................... 6-84
îš‹ Hold Analog Frequency Using User-set Timing ........................................................... 6-85
îš‹ Switching Operations between a Communications Option Board and Control Circuit
Terminals ...................................................................................................................... 6-85
îš‹ Jog Frequency Operation without Forward and Reverse Commands (FJOG/RJOG) . 6-86
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