YASKAWA A1000 HHP Programming Manual page 132

1.8 L: Protection Functions
No.
L1-04 Motor Overheat Fault 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.
n 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.
L1-05 Motor Temperature Input Filter Time (PTC input)
n L1-13: Continuous Electrothermal Operation Selection
Determines whether to hold the current value of the electrothermal motor protection (L1-01) when the power supply is
interrupted.
No.
L1-13
Setting 0: Disabled
Setting 1: Enabled
n Motor Protection Using an NTC Thermistor Input
Motor protection is possible for models 4A0930, 4A1200, and A1000 HHP by connecting the NTC thermistor input in the
motor windings to one of the drive analog input terminals.
This enables the drive to provide torque compensation in response to changes in motor temperature and protect the motor from
overheating.
If the NTC input signal using the drive multi-function analog input terminal exceeds the overheat alarm level set to L1-16 (or
L1-18 for motor 2), then "oH5" will flash on the digital operator screen. The drive will respond to the alarm according to the
setting of L1-20 (default setting is to continue operation when an oH5 alarm occurs).
Figure 1.88 shows a circuit using the NTC thermistor and the terminal resistance values. Set DIP switch S1 on the drive to
"V" for voltage input when wiring the NTC thermistor input to terminal A2 on the drive.
Note: This example assumes that H3-10 = 17, H3-09 = 0, and that DIP switch S1 has been set for voltage input.
132
Name
Name
Name
Continuous Electrothermal Operation Selection
Voltage Divider
2 kW
NTC Thermistor
Figure 1.88 Motor Protection Circuit Using NTC Input
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
Setting Range
Setting Range
0.00 to 10.00 s
Setting Range
Drive
+V
(+10.5 V, 20 mA)
A2 (0-10 V)
DIP Switch S1
AC
V I
Default
0 to 2
Default
0.20 s
Default
0, 1
1
1