Machine Protection6- 63Setting the Motor Overload Pre-AlarmIf the motor overload protection function is enabled (i.e., L1-01 is set to other than 0) and you set H2-01 toH2-03 (multi-function output terminals M1-M2, P1-PC, and P2-PC function selection) to 1F (motor overloadOL1 pre-alarm), the motor overload pre-alarm will be enabled. If the electronic thermal value reaches mini-mum 90% of the overload detection level, the output terminal that has been set will be turned ON. Motor Overheating Protection Using PTC Thermistor InputsPerform motor overheating protection using the thermistor temperature resistance characteristics of the PTC(Positive Temperature Coefficient) built into the windings of each motor phase.Related ConstantsCon-stantNumberName Description SettingRangeFactorySettingChangeduringOpera-tionControl Methods MEMOBUSRegis-terV/fV/fwithPGOpenLoopVec-torFluxVec-torL1-03Alarm opera-tion selectionduring motoroverheatingSet Multi-function input termi-nal or A2 (H3-09)to E and select the operationwhen the input motor tempera-ture (thermistor) input exceedsthe alarm detection level [1.17 V(±5%)].0: Decelerate to stop1: Coast to stop2: Emergency stop using thedeceleration time in C1-09.3: Continue operation (H3 onthe Operator flashes).0 to 3 3 No A A A A 482HL1-04Motor over-heating oper-ationselectionSet Multi-function input termi-nal or A2 (H3-09)to E and select the operationwhen the motor temperature(thermistor) input exceeds theoperation detection level [2.34V(±5%)].0: Decelerate to stop1: Coast to stop2: Emergency stop using thedeceleration time in C1-09.0 to 2 1 No A A A A 483HL1-05Motor tem-perature inputfilter timeconstantSet Multi-function input termi-nal or A2 (H3-09)to E and set the primary delaytime constant for motor temper-ature (thermistor) inputs in sec-onds.0.00 to10.00 0.20 s No A A A A 484HA3 (H3-05)A3 (H3-05)A3 (H3-05)
