Drive
+V
(+10.5V, 20 mA)
Multi-function input
Branch
resistor
12 k
PTC
thermistor
MA
Multi-function
output (contact)
Multi-function
output (photocoupler)
MB
MC
P1
P2
PC
A2 (0-10 V)
AC
Figure 5.77 Connection of a Motor PTC
The PTC must have the following characteristics for one motor phase. Normally a motor is protected by three PTCs
connected in series.
Figure 5.78 Motor PTC Characteristics
Overheat detection using a PTC can be set up by parameters L1-03/04/05 as explained below.
n
L1-03: Motor Overheat Alarm (oH3) Operation Selection
Sets the drive operation when the PTC input signal reaches the motor overheat alarm level. (PTC input level: Tr - 5 °C)
No. Name Setting Range Default
L1-03 Motor Overheat Alarm Operation Selection 0 to 3 3
Setting 0: Ramp to Stop
The drive stops the motor using the active deceleration time.
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 (oH4) Operation Selection
Sets the drive operation when the PTC input signal reaches the motor overheat fault level. (PTC input level: Tr + 5 °C)
No. Name Setting Range Default
L1-04 Motor Overheat Fault Operation Selection 0 to 2 1
Setting 0: Ramp to Stop
The drive stops the motor using the active deceleration time.
5.8 L: Protection Functions
206
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
To Next Page
Loading...
Need help?
General
