YASKAWA U1000 - Page 313

Resistance ( )
Class F
150 ºC
Class H
180 ºC
Tr: threshold value
Temperature
Tr’
Tr + 5K (oH4 Fault Level)TrTr - 5K (oH3 Alarm Level)
Figure 5.90 Motor PTC Characteristics
Set up overheat detection using a PTC using parameters L1-03, L1-04, and L1-05 as explained in the following sections.
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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).
No. Name Setting Range Default
L1-03 Motor Overheat Alarm Operation Selection (PTC input) 0 to 3 3
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).
No. Name Setting Range Default
L1-04 Motor Overheat Fault Operation Selection (PTC input) 0 to 2 1
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)
Sets a filter on the PTC input signal to prevent erroneous detection of a motor overheat fault.
No. Name Setting Range Default
L1-05 Motor Temperature Input Filter Time (PTC input) 0.00 to 10.00 s 0.20 s
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L1-08: oL1 Current Level
Sets the reference current for motor thermal overload detection for motor 1 in amperes. When L1-08 is set to 0.0 A (default),
parameter E2-01 (E5-03 in PM control modes) is used as the reference for motor overload protection. When L1-08 ≠0.0 A,
the set value is used as the reference for motor overload protection.
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
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Parameter Details