5 WORK OPERATION
5.24 MHL380 D
5.4.1.1 Magnet system control device
(MMI – Man Machine Interface)
LED 1 : Supply voltage present for magnet
system control device – green status indi-
cator
The system is switched on and ready for op-
eration, the generator is running.
LED 2 : Magnetic plate switched on for
"Lift" – yellow status indicator
This LED remains lit as long as the magnetic
plate is switched on. When the magnet plate
is switched off, i.e. when the load is dropped,
this LED goes out.
If, after switching on the magnetic plate, this
LED only lights up for approx. 1 second and
then goes out automatically, the magnetic
plate's connecting cable is not plugged in or has
been broken.
LED 3: Quick demagnetization of the mag-
netic plate "Drop" – yellow status indicator
This LED is lit during automatic quick demag-
netization. The LED goes out as soon as
quick demagnetization is completely finished.
This LED also goes out if quick demagnetiza-
tion is interrupted. In this case there might be
some residual magnetization on the magnetic
plate for a certain time as natural demagneti-
zation is a considerably slower process.
LED 4: Interruption / Interface error – red
error indicator
LED lit: Interruption
This LED lights up if the magnetic plate's con-
necting cable is not plugged in or has been
broken. After power-up, a check is made to
see whether current is being supplied to the
magnetic plate. If there is no current, the
magnetic plate is switched off again after ap-
proximately 1 second and this LED lights up.
It will go out if the error is corrected before the
system is switched on again.
LED flashing: Interface error:
This LED flashes if there is an error on the
communication interface between the magnet
system's control device and the control sys-
tem.
Fig. 145 Magnet system control device
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