Using the digital operator
Page 44 / 52
Extended functions of group B
Most of the functions of group B serve safety purposes or are used to protect the inverter from damages.
Function
Display *)
Function description / parameter setting range
Standard
setting
Set
values
Automatic restart after inverter trip
WARNING
On occurance of a trip condition this function causes an automatic inverter restart if a
running command is being active at the same time. Additional precautions must be taken
for personnel not to get endangered in case of a motor restart.
In standard setting any inverter failure will cause a trip condition. An automatic motor restart following an inverter trip
is possible with: Overcurrent (
E 01
–
E 04
, with a maximum of 4 retries within 10 minutes, after 4 retries the inverter
trips); Overvoltage (
E 07
,
E 15
, with a maximum of 3 retries within 10 minutes, after 3 retries the inverter trips);
Undervoltage (
E 09
, with a maximum of 16 retries within 10 minutes, after 16 retries the inverter trips)
Restart mode
b 01
N
Here the inverter reaction to trips
E 01
through
E 04
,
E 07
,
E 09
,
and
E 15
is selected:
00: Trip messages are displayed on occurrance of the above
trips (retry is not active).
01: Restart with start frequency after the time set under
b 03
has elapsed.
02: After the time set under
b 03
has elapsed the inverter
synchronizes to the motor’s current speed and the motor is
accelerated using the configured acceleration time.
03: After the time set under
b 03
has elapsed the inverter
synchronizes to the motor’s current speed and the motor is
decelerated using the configured deceleration time. Afterwards
the corresponding trip will be displayed.
00
Allowable under-
voltage failure time
b 02
N
Here the time is entered during which the undervoltage condition
is met while the corresponding trip
E 09
is not being displayed.
Setting range: 0.3s–25s.
1.0
Waiting time
until retry
b 03
N
Here the time is entered that must elapse following one of the
above mentioned trip conditions before automatic retry is
initiated. During the waiting time the message
is
displayed on the LED display.
Setting range: 0.3s–100s.
1.0
Function
Display *)
Function description / parameter setting range
Standard
setting
Set
values
Electronic motor protection
The L2000 series inverters have a an electronic facility that is able to monitor the driven motor’s thermal load. This
electronic thermal motor protection facility is matched to the motor’s rated current using function
b 12
. However, the
motor temperature can not be monitored if values are entered that are above the rated current of the motor. In this
case you will have to install PTC thermistors or thermo contacts into the motor windings.
Electronic thermal
protection current
b 12
N
The setting range lies between 0.5 times and 1.2 times of the
inverter rated current (i.e. the entered value has a unit of A).
Inverter
rated
current
Electronic thermal
characteristic
b 13
N
Output
current
100%
80%
60%
5
20
50 Hz
100
f
Constant motor
protection (
01
)
Increased motor
protection (
00
)
01
Содержание L2000 Series
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