12.8 L: PROTECTION
738 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
Figure 12.117 Connect Motor PTC
2. Set drive DIP switch S1-3 to V (voltage) and set DIP switch S4 to PTC.
3. Set these MFAI terminals:
• Set H3-05 = 0 [AI3 Signal Level Select = 0 to 10V (Lower Limit at 0)].
• Set H3-06 = 16 [AI3 Function Selection = Mot PTC Input].
4. Set these L1 parameters:
• L1-03 [Motor oH AL Reaction Select]
• L1-04 [Motor oH FLT Reaction Select]
• L1-05 [Motor Therm.Filter Time]
■ L1-01 Motor Cool Type for OL1 Calc
No.
(Hex.)
Name Description
Default
(Range)
L1-01
(0480)
Motor Cool Type for OL1
Calc
Sets the motor overload protection with electronic thermal protectors.
Determined by A1-02
(0 - 6)
This parameter enables and disables the motor overload protection with electronic thermal protectors.
The cooling capability of the motor changes when the speed control range of the motor changes. Use an electronic
thermal protector that aligns with the permitted load characteristics of the motor to select motor protection.
The electronic thermal protector of the drive uses these items to calculate motor overload tolerance and supply
overload protection for the motor:
• Output current
• Output frequency
• Motor thermal characteristics
• Time characteristics
If the drive detects motor overload, the drive will trigger an oL1 [Motor Overload] and stop the drive output.
Set H2-01 = 4E [2NO-2CM Func Selection = Drive PreOH] to set a motor overload alarm. If the motor overload
level is more than 90% of the oL1 detection level, the output terminal turns ON and triggers an overload alarm.
1 : VTorque
Disable motor protection when motor overload protection is not necessary or when the drive is operating more
than one motor.
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