YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
103
Note:
The display units are different for different models:
•
0.01 A: models 2004 - 2042, 4002 - 4023
•
0.1 A: models 2056 - 2415, 4031 - 4H12, T103 - T720
The setting value of
E9-06
is the reference value for motor protection. Enter the motor rated current written on the
motor nameplate. Auto-Tuning the drive will automatically set
E9-06
to the value input for
“
Motor Rated Current
”
.
■
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 protection 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 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 : Disabled
Disable motor protection when motor overload protection is not necessary or when the drive is operating more than
one motor.
Refer to
for an example of the circuit configuration to connect more than one motor to one drive.
Figure 12.3 Protection Circuit Configuration to Connect More than One Motor to One Drive
NOTICE
When you connect more than one motor to one drive or when the motor amp rating is higher than the drive amp
rating, set L1-01 =0 [Motor Overload (oL1) Protection = Disabled] and install thermal overload relays for each motor. The electronic
thermal protection of the drive will not function and it can cause damage to the motor.
1 : Variable Torque
Use this setting for general-purpose motors with a 60 Hz base frequency.
The overload tolerance decreases as motor speed decreases because the cooling fan speed decreases and the ability of
the motor to cool decreases in the low speed range.
The overload tolerance characteristics of the motor change the trigger point for the electronic thermal protection. This
provides motor overheat protection from low speed to high speed across the full speed range.
V/f
CL-V/f
OLV
CLV
AOLV
OLV/PM
OLV/PM AOLV/PM CLV/PM
EZOLV