YASKAWA GA700 Technical Manual page 828

11.9 L: Protection Function
2. Set the drive DIP switch S1-3 to V (voltage) and set DIP switch S4 to PTC.
3. Set the following MFAI terminals.
• Set H3-05 = 0 [Terminal A3 Signal Level Select = 0-10V (LowLim=0)].
• Set H3-06 = E [Terminal A3 Function Selection = Motor Temperature (PTC input)].
4. Set the following L1 parameters.
• L1-03 [Motor OH Alarm Operation Select]
• L1-04 [Motor OH Fault Operation Select]
• L1-05 [Motor Temp Input Filter Time]
■
L1-01: Motor Overload Protection Select
No.
Name
(Hex.)
L1-01 Motor Overload
(oL1) Protection
(0480)
Enables or disables the motor overload protection using electronic thermal protectors.
Cooling capability varies depending on the speed control range of the motor. Select motor protection using an
electronic thermal protector that matches the allowable load characteristics of the motor being used.
The drive has overload protection for the motor using an electronic thermal protector. The electronic thermal
protector of the drive calculates motor overload tolerance based on output current, output frequency, motor
thermal characteristics, and time characteristics to provide overload protection for the motor. The drive triggers an
oL1[Motor Overload] and shuts off the drive output when the drive detects motor overload.
It is also possible to set a motor overload alarm. Set H2-01 = 1F [Terminal M1-M2 Function Selection = Motor
overload alarm (oL1)] to set a motor overload alarm. When the motor overload level rises above 90% of the oL1
detection level, the output terminal switches ON and triggers an overload alarm.
Note:
Set L1-01 = 1 to 6 [Enabled] to enable motor protection when operating a single motor. External thermal relays are not necessary in
such cases.
0 : Disabled
Disable motor protection when motor overload protection is not required or when the drive is operating more than
one motor.
The following diagram shows an example of the circuit configuration when connecting multiple motors to a single
drive.
828
Figure 11.118 Connection of a Motor PTC
V/f CL-V/f OLV CLV AOLV
Enables or disables the motor overload protection using electronic thermal
protectors.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
Determined by A1-02
(0 - 6)