12
Error number
Error message
Remedial action
33
Runtime error
Set the permissible running time (menu 33);
determine the cause for a longer running
time e.g. overload (reducing the speed) or
defect in the power transmission
41
Excess voltage / warning
Install a chopper resistor; if necessary,
check the drive type for suitability. The
control does not switch off the drive.
12.
Protective functions
Overload protection:
When exceeding the permissible motor voltage by feeding back of the drive with regard to
pulling loads, the control reduces the speed permanently, until the voltage is once again
within the permissible range. (Note: When falling below the minimum speed, error 24 may
occur). By using a chopper resistor, such behaviour may be eliminated.
When reaching motor voltages which may cause damage to the control, travelling is stopped
(Error 23). By error 41, an advance warning is displayed.
Excess current:
In order to protect the control, a current monitor is integrated additionally. When exceeding
the current limit value provided for the set drive, the control reduces the speed of the drive.
In doing so, the impermissible current consumption is reduced (if necessary) and the system
is still operational. However, in case of continuing excess current (>10 sec), the control
switches off (Error 29).
Speed monitoring:
The drive speed of the set drive is monitored. When falling below or exceeding the speed,
the drive is switched off. The fault is displayed by the error message 24, 25 or 28.
13.
Chopper resistor
Drives with low self-locking (such as e.g. tubular motors) can increase their drive speed when
operating with pulling loads. For example, this can occur if the cover is installed underwater.
Due to the increased speed, electrical power can be fed back into the control which may
cause damage to the control. The speed and the feed-back process are monitored and, if
necessary, output with an error message. By connecting a chopper resistor (27-47 Ohm,
50W, cooled) to the two contact points X7, the power fed back can be converted into heat.
