xii
Machine Protection .................................................................................... 6-30
Preventing Motor Stalling During Operation ................................................................. 6-30
Detecting Motor Torque ................................................................................................ 6-30
Motor Overload Protection ........................................................................................... 6-33
Motor Overheating Protection Using PTC Thermistor Inputs ....................................... 6-35
Continuing Operation ................................................................................. 6-37
Restarting Automatically After Power Is Restored ....................................................... 6-37
Speed Search............................................................................................................... 6-38
Continuing Operation at Constant Speed When Frequency Reference Is Lost ........... 6-43
Restarting Operation After Transient Fault (Auto Restart Function) ............................ 6-43
Inverter Protection ...................................................................................... 6-45
Reducing Inverter Overheating Pre-Alarm Warning Levels ......................................... 6-45
Input Terminal Functions ............................................................................ 6-46
Temporarily Switching Operation between Digital Operator
and Control Circuit Terminals ....................................................................................... 6-46
Blocking Inverter Outputs (Baseblock Commands)...................................................... 6-46
Hold Analog Frequency Using User-set Timing ........................................................... 6-47
Switching Operations between a Communications Option Card
and Control Circuit Terminals....................................................................................... 6-48
Jog Frequency Operation without Forward and Reverse Commands
(FJOG/RJOG) .............................................................................................................. 6-48
Stopping the Inverter by Notifying Programming Device Errors to the Inverter
(External Error Function) .............................................................................................. 6-49
Monitor Parameters.................................................................................... 6-50
Using the Analog Monitor Parameters ......................................................................... 6-50
Individual Functions ................................................................................... 6-52
Using PI Control ........................................................................................................... 6-65
Energy-saving .............................................................................................................. 6-72
Setting Motor Constant Parameters ............................................................................. 6-73
Setting the V/f Pattern .................................................................................................. 6-74
Digital Operator Functions ......................................................................... 6-80
Setting Digital Operator Functions ............................................................................... 6-80
Copying Parameters..................................................................................................... 6-82
Prohibiting Writing Parameters from the Digital Operator ............................................ 6-86
Setting a Password ...................................................................................................... 6-86
7
Troubleshooting ......................................................................7-1
Protective and Diagnostic Functions ............................................................ 7-2
Fault Detection ............................................................................................................... 7-2
Alarm Detection.............................................................................................................. 7-7
Operation Errors............................................................................................................. 7-9
Errors During Autotuning............................................................................................. 7-10
Errors when Using the Digital Operator Copy Function ............................................... 7-11
Troubleshooting.......................................................................................... 7-12
