YASKAWA GA800 Programming Manual page 436

2.9 L: Protection Functions
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.
Name
(Hex.)
L1-01 Motor Overload (oL1)
Protection
(0480)
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 turns ON and triggers an
overload alarm.
0 : Disabled
Disable motor protection when motor overload protection is not necessary or when the drive is operating more than
one motor.
Refer to Figure 2.121 for an example of the circuit configuration to connect more than one motor to one drive.
436
Figure 2.120 Connect Motor PTC
V/f CL-V/f OLV CLV AOLV
Sets the motor overload protection with electronic thermal protectors.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
Determined by A1-02
(0 - 6)