Siemens SINUMERIK 808D Service Manual - Page 12

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Also for Siemens SINUMERIK 808D: Operating Instructions Manual (34 pages), Service Manual (46 pages), Instructions (2 pages), Installation Manual (48 pages)

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3.1

System startup fault

Fault description

The control system cannot start up successfully after power-on; the PPU normally shows a black screen with no display at

all.

Diagnostic steps

Check the status LED on the PPU panel.

If the status LED is lit, power off the control system and check whether

•

you have inserted the CF card properly. Then power on again and

observe whether you have eliminated the fault.

If the status LED is off, check the power supply interface (X1) on the

•

back of the PPU for the following:

–

Whether the connection is loose

–

Whether the 24 V terminal matches the interface

–

Whether the 24 VDC power supply is available by measuring with a

multimeter

Replacement and maintenance are necessary if the fault still exists after

the above operations, because probably the PPU is damaged.

3.2

PPU/HMI fault

Fault description

The HMI screen or the keys on the PPU are inactive.

Diagnostic steps

Check whether the control system is in the crashed state. If yes, restart the control system and then check whether the

fault still exists.

Replacement and maintenance are necessary if the fault still exists after the above operations, because probably the

PPU is damaged.

Service Manual

01/2017