3
General description, function
10.2013
15
B
A
_S
LE
22
_E
N
.D
O
C
X
3.7.2
Mechanical operating hours counter
The device counts the total operating hours. They are shown on the operating hours
counter mounted on the front.
•
If motor management for frequency inverter operation is selected, the operating
hours counter starts to count as soon as the hoist motor is activated.
•
If motor management for a pole-changing motor is selected, the operating hours
counter starts to count as soon as the hoist motor is activated.
3.7.3
Temperature control for hoist and travel motors
DANGER
ϑ
ϑϑ
ϑ
1
The hoist motor temperature is constantly monitored. If the motor ptc thermistor (input
ϑ
ϑϑ
ϑ
1
) is activated a message is given via the device LEDs and all hoist motions (outputs
K↓
,
K↓↓
and
K↑
,
K↑↑
) are disabled..
The load cannot be moved until the hoist motor has cooled off.
NOTICE
The ptc thermistor input
ϑ
ϑϑ
ϑ
1
is monitored for short-circuiting. If the resistance measured
at the ptc thermistor input drops to <80 Ohm, a ptc thermistor error is displayed for
ϑ
ϑϑ
ϑ
1
and the hoist motions disabled as for overtemperature (see chapter 9.2.1).
WARNING
ϑ
ϑϑ
ϑ
2
The travel motor PTC thermistor(s) are connected to temperature input
ϑ
ϑϑ
ϑ
2
. If the PTC
thermistor reaches cut-off temperature, the SLE22 detects the status
overtemperature2
and disconnects
left/right
. The travel motors can no longer be activated.
After the motor has cooled down the error is automatically acknowledged by the SLE22.
NOTICE
•
All PTC thermistors must meet the requirements of DIN 44080.
•
All PTC thermistors can be replaced by resistances with ~300 Ohm if the motors
used have no PTC thermistors.
CAUTION:
The hoist or cross travel motors are then no longer protected against
overtemperature.
•
Note technical data!
The ptc thermistor inputs are monitored for short-circuiting. If the resistance
measured at the input drops to <80 Ohm, a ptc thermistor error is displayed.
If no temperature sensor is connected to
ϑ
ϑϑ
ϑ
2
the warning signal can be disabled by
switching sliding switch S3_2.
left/right
is switched independently of this.