xii
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) ............................................................ 6-41
Preventing Motor Stalling During Operation ................................................................. 6-43
Changing Stall Prevention Level during Operation Using an Analog Input .................. 6-44
Detecting Motor Torque ................................................................................................ 6-44
Changing Overtorque and Undertorque Detection Levels Using an Analog Input ....... 6-48
Motor Overload Protection ........................................................................................... 6-49
Setting Motor Protection Operation Time ..................................................................... 6-51
Motor Overheating Protection Using PTC Thermistor Inputs ....................................... 6-52
Limiting Motor Rotation Direction ................................................................................. 6-54
Continuing Operation ................................................................................. 6-55
Restarting Automatically After Power Is Restored........................................................ 6-55
Speed Search............................................................................................................... 6-56
Continuing Operation at Constant Speed When Frequency Reference Is Lost ........... 6-62
Restarting Operation After Transient Error (Auto Restart Function) ............................ 6-63
Inverter Protection...................................................................................... 6-64
Performing Overheating Protection on Mounted Braking Resistors............................. 6-64
Reducing Inverter Overheating Pre-Alarm Warning Levels ......................................... 6-65
Input Terminal Functions ............................................................................ 6-66
Temporarily Switching Operation between Digital Operator and Control Circuit
Terminals ...................................................................................................................... 6-66
Blocking Inverter Outputs (Baseblock Commands)...................................................... 6-67
Stopping Acceleration and Deceleration (Acceleration/Deceleration Ramp Hold)....... 6-68
Raising and Lowering Frequency References Using Contact Signals (UP/DOWN) .... 6-69
Accelerating and Decelerating Constant Frequencies in the Analog References
(+/- Speed) ................................................................................................................... 6-72
Hold Analog Frequency Using User-set Timing ........................................................... 6-73
Switching Operations between a Communications Option Card and Control Circuit
Terminals ...................................................................................................................... 6-73
Jog Frequency Operation without Forward and Reverse Commands (FJOG/RJOG) . 6-74
Stopping the Inverter by Notifying Programming Device Errors to the Inverter
(External Fault Function) .............................................................................................. 6-75
Monitor Constants ...................................................................................... 6-76
Using the Analog Monitor Constants ............................................................................ 6-76
Using Pulse Train Monitor Contents............................................................................. 6-79
Individual Functions ................................................................................... 6-81
Using MEMOBUS Communications............................................................................. 6-81
Using the Timer Function ............................................................................................. 6-93
Using PID Control......................................................................................................... 6-94
Energy-saving ............................................................................................................ 6-103
Setting Motor Constants............................................................................................. 6-105
Setting the V/f Pattern ................................................................................................ 6-107
Torque Control ........................................................................................................... 6-114
Speed Control (ASR) Structure .................................................................................. 6-122
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