5.8 L: Protection Functions
300 YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
Figure 5. 90
Figure 5.90 Connection of a Motor PTC
The PTC must have the following characteristics for one motor phase. The drives motor overload detection expects 3 of
these PTCs to be connected in series.
Figure 5. 91
Figure 5.91 Motor PTC Characteristics
Overheat detection using a PTC can be set up by parameters L1-03, L1-04, and L1-05 as explained below.
■
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.
■
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
L1-03 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
Drive
Multi-function input
PTC
thermistor
MA
Fault output
Multi-function
digital outputs
MB
MC
A3 (0-10 V)
AC
M1
M2
PTC
AI
DIP Switch S4
M3
M4
M5
M6
Tr’
Tr + 5K (oH4 Fault Level)Tr - 5K (oH3 Alarm Level)
SIEP_C710636_02B_1_0.book 300 ページ ２０１５年１１月２５日 水曜日 午後４時５６分
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