YASKAWA A1000 HHP Programming Manual page 131

The PTC must exhibit the characteristics shown in
expects 3 of these PTCs to be connected in a series.
Set up overheat detection using a PTC using parameters L1-03, L1-04, and L1-05 as explained in the following sections.
n 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.
L1-03 Motor Overheat Alarm Operation Selection (PTC input)
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.
n 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).
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Drive
Multi-function input
DIP Switch S4
PTC
AI
A3 (0-10 V)
PTC
thermistor
AC
Figure 1.86 Connection of a Motor PTC
Figure 1.87
Resistance ( )
Tr - 5K (oH3 Alarm Level)
Figure 1.87 Motor PTC Characteristics
Name
MA
Fault output
MB
MC
M1
M2
Multi-function
M3
digital outputs
M4
M5
M6
in one motor phase. The motor overload protection of the drive
Class H
Class F
180 ºC
150 ºC
Tr: threshold value
Temperature
Tr'
Tr Tr + 5K (oH4 Fault Level)
Setting Range
1.8 L: Protection Functions
Default
0 to 3 3
1
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