YASKAWA A1000 Series Technical Manual

5.8 L: Protection Functions
248 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
Overheat detection using a PTC can be set up by parameters L1-03, L1-04, and L1-05 as explained below.
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L1-03: Motor Overheat Alarm Operation Selection (PTC input)
Sets the drive operation when the PTC input signal reaches the motor overheat alarm level (oH3).
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Fast Stop
The drive stops the motor using the Fast Stop time set in parameter C1-09.
Setting 3: Alarm only
The operation is continued and an oH3 alarm is displayed on the digital operator.
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L1-04: Motor Overheat Fault Operation Selection (PTC input)
Sets the drive operation when the PTC input signal reaches the motor overheat fault level (oH4).
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to Stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Fast Stop
The drive stops the motor using the Fast Stop time set in parameter C1-09.
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L1-05: Motor Temperature Input Filter Time (PTC input)
Used to set a filter on the PTC input signal in order to prevent a motor overheat fault from being mistakenly detected.
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L1-13: Continuous Electrothermal Operation Selection
Determines whether or not to hold the current value of the electrothermal motor protection (L1-01) when the power
supply is interrupted.
Setting 0: Disabled
Setting 1: Enabled
No. Name Setting Range Default
L1-03 Motor Overheat Alarm Operation Selection (PTC input) 0 to 3 3
No. Name Setting Range Default
L1-04 Motor Overheat Fault Operation Selection (PTC input) 0 to 2 1
No. Name Setting Range Default
L1-05 Motor Temperature Input Filter Time (PTC input) 0.00 to 10.00 s 0.20 s
No. Name Setting Range Default
L1-13 Continuous Electrothermal Operation Selection 0 or 1 1

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)