YASKAWA V7 Technical Manual

Also see for SI-T/ V7: Instructions

Contents

5-31Overtorque detection is used to compare Drive rated output current/torque with the overtorquedetection level. When the output current is equal to or greater than the defined level, an overtorquecondition exists. This will be indicated as an oL3 fault on the Digital Operator. This feature can beselected to operate over a wide range of conditions.A. n096 : Overtorque Detection Factory setting: 0This constant determines whether the overtorque detection function of the Drive is enabled, underwhat conditions it will detect for overtorque, and what operation it will perform after detecting anovertorque.OperationOvertorque After DetectionSetting Disabled Detection Condition0 Disabled —— ——1 Overtorque Continues Only at set frequency2 Overtorque Coast to stop Only at set frequency3 Overtorque Continues At all times except duringstopping or DC injection braking4 Overtorque Coast to stop At all times except duringstopping or DC injection braking— For overtorque detection during accel or decel, set to " 3 " or " 4 ".— For continuous operation after overtorque detection, set to " 1 " or " 3 ". During detection, the Digital Operator dis-plays and “ oL3 ” alarm (blinking).— To stop the drive at an overtorque detection fault, set to " 2 " or " 4 ". At detection, the Digital Operator displays an" oL3 " fault.— To output an overtorque detection signal, set output terminal function selection (n057, n058 or n059 ) to" 6 " or " 7 ".B. n098 : Overtorque Detection Level Factory setting: 160 %Range: 30 to 200 %This is the reference point for determining that an overtorque condition exists. Set as a percent ofDrive rated current or as a percent of motor rated torque.C. n097 : Overtorque Detection Selection Factory setting: 0During Open Loop Vector ControlThis parameter is only effective when the drive is in the Open Loop Vector control method.D. n099 : Overtorque / Undertorque Detection Time Factory setting: 0.1 sec.Range: 0.0 to 10.0 secondsDetermines how long an overtorque condition must exist before another event will occur, e.g. coastto stop, multi-function output change of state, or oL3 warning or fault display.5.20 OVERTORQUE DETECTIONSetting Description0 Detected by motor output torque (as a percentage of motor rated torque)1 Detected by drive output current (as a percentage of drive rated current)