Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 959
Figure 12.120 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 [Terminal A3 Signal Level Select = 0 to 10V (Lower Limit at 0)].
• Set H3-06 = E [Terminal A3 Function Selection = Motor Temperature (PTC input)].
4. Set these L1 parameters:
• L1-03 [Motor Thermistor oH Alarm Select]
• L1-04 [Motor Thermistor oH Fault Select]
• L1-05 [Motor Thermistor Filter Time]
■ L1-01: Motor Overload (oL1) Protection
No.
(Hex.)
Name Description
Default
(Range)
L1-01
(0480)
Motor Overload (oL1)
Protection
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 = 1F [Term M1-M2 Function Selection = Motor Overload Alarm (oL1)] to set a motor overload alarm. If
the motor overload level is more than 90% of the oL1 detection level, the output terminal activates and triggers an
overload alarm.
0 : Disable
Disable motor protection when motor overload protection is not necessary or when the drive is operating more than
one motor.
Refer to Figure 12.121 for an example of the circuit configuration to connect more than one motor to one drive.
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