Siemens PC 670 - Manual (Page 122)

Fault Diagnosis Release 04/02
6-2 Panel PC 670 Computing Unit, Equipment Manual
6.1 Problems Using External Modules
Fault screen
Computing unit crashes during boot routine.
Cause
The following causes are possible:
– Double assignment of input/output addresses,
– Double assignment of hardware interrupts and/or DMA channels,
– Signal frequencies or signal levels are not maintained,
– Deviating assignment of the connector
Remedy
Checking the computer configuration:
S If the computer configuration corresponds to state on delivery, please contact
your technical service department.
S
If the computer configuration has been modified, restore the state on delivery;
to do this, remove the external modules and restart the computer:
– If the computing unit crashes again, contact the technical service
department.
– If the fault no longer occurs, the external module used was the cause of the
fault. Replace the module with a Siemens module or get advice from the
supplier of the external module.