YASKAWA G7 Series - Page 12

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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
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