Siemens 7VK512

-AINTENANCE AND FAULT TRACING6+
6

#
' #
#LOCK MODULE
ON MULTI
PIN SOCKET
&IGURE  0OSITION OF THE CLOCK MODULE
 &AULT TRACING
)F THE DEVICE INDICATES A DEFECT THE FOLLOWING PROCE
DURE IS SUGGESTED
)F NONE OF THE ,%$S ON THE FRONT PLATE OF THE MODULE IS
ON THEN CHECK
(AS THE MODULE BEEN PROPERLY PUSHED IN AND
LOCKED
)S THE /./&& SWITCH ON THE FRONT PLATE IN THE /.
POSITION  
)S THE AUXILIARY VOLTAGE AVAILABLE WITH THE CORRECT
POLARITY AND OF ADEQUATE MAGNITUDE CONNECTED
TO THE CORRECT TERMINALS 'ENERAL DIAGRAMS IN !P
PENDIX !
(AS THE MINI FUSE IN THE POWER SUPPLY SECTION
BLOWN SEE &IGURE  )F APPROPRIATE REPLACE THE
FUSE ACCORDING TO 3ECTION 
)F THE RED FAULT INDICATOR
"LOCKED ON THE FRONT IS ON
AND THE GREEN READY ,%$ REMAINS DARK THE DEVICE
HAS RECOGNIZED AN INTERNAL FAULT 2E
INITIALIZATION OF
THE PROCESSOR SYSTEM COULD BE TRIED BY SWITCHING
THE PROCESSOR SYSTEM OFF AND ON AGAIN BY MEANS OF
THE SWITCH IN THE FRONT PLATE 4HIS HOWEVER RESULTS IN
LOSS OF ANNUNCIATIONS AND MESSAGES IF THE RELAY IS
NOT EQUIPPED WITH THE CLOCK MODULE AND IF A PARA
METERIZING PROCESS HAS NOT YET BEEN COMPLETED THE
LAST PARAMETERS ARE NOT STORED