Operating instructions

Troubleshooting/FAQs
14.2 Problems when Using Modules of Third-party Manufacturers
SIMATIC Panel PC 677B
Operating Instructions, 05/2007, A5E01035609-01
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14.2 Problems when Using Modules of Third-party Manufacturers
Problem Possible cause Remedy
Check your computer configuration:
• If the computer configuration corresponds with factory state,
please contact your technical support team.
• If the computer configuration has changed, restore the
original factory settings. Remove all third-party modules,
then restart the PC. If the error no longer occurs, the third-
party module was the cause of the fault. Replace this
module with a Siemens module or contact the module
supplier.
• Force a "Reset Configuration" using the BIOS Setup.
• Double allocation of I/O
addresses
• Double allocation of hardware
interrupts and/or DMA channels
• Signal frequencies or signal
levels are incorrect.
• Connector assignments deviate.
• No "Reset Configuration" in
BIOS Setup
If the PC still crashes, contact your technical support team.
The PC crashes
during startup
• If the performance of the
external 24 V power supply is
insufficient
• use a larger power supply.
14.3 Temperature limits
Cause
If the device is used for its intended purpose, the temperature threshold values are not
exceeded or fallen below. When the LED "Temp" on the upper left side of the operator
control unit lights up, check the following:
● Are the fan apertures covered?
● Has the fan failed (check speed display in the SOM or on the DiagMonitor)?
● Is the ambient temperature higher than the allowed value (see "Technical data")?
● Is the total output of the power supply within the specified limit?
● Are the heatsinks inside the PC covered with dust?
Remedy
The temperature error is retained until the temperatures have fallen below the thresholds
and you have acknowledged the error alarm in the SOM program. Click on the button with
the "small broom" icon. When the error alarm has been acknowledged, the "TEMP" LED on
the devices goes off and the title bar and "SOM" icon in the status bar of the SOM program
changes from red to green. If you have not installed the SOM program or DiagMonitor, you
must restart the PC.