BECKHOFF DK9122-0510-0025 - Manual (Page 3)

Industrial PC
Diagnostics and configuration
Application Note DK9122-0510-0025
Recognition of a problem
The decreasing speed of rotation of a CPU fan is a first signal that usually points to strong contamination of the fan and
indicates a possible upcoming failure. If the plant operator is informed of this by a pop-up on the screen, then cleaning or
replacement of the fan should be considered during scheduled maintenance work and a failure of the IPC due to poor heat
dissipation can be avoided. The costs of unplanned downtime are negligible in comparison with this small maintenance job.
However, if there is a large increase in the CPU temperature as the fan speed decreases, one should not wait until the next
planned maintenance. Since the IPCs feature an emergency power-off in the case of over-temperature, system failure is
imminent in this case without further cooling. If this condition is also indicated by a message, then effective intervention
measures can be taken: the emergency power-off is prevented by clear instructions for action, such as the request to switch off
the PC or to open the control cabinet doors.
Chassis fan speed below minimum! Current fan speed 5273 rpm !
OK
Motherboard temperature is critical! Current temperature 51° C !
OK
Execution of programs or tasks for switching the IPC off
Optional
CPU temperature | increasing Fan speed | decreasing
Monitoring of defined parameters
Fig. 2 Analysis of the information, with optional further steps
Information on limit values for speeds of rotation, temperatures and voltages for Beckhoff IPCs can be found in the
documentation (links at the end of the document).
New Automation Technology Beckhoff
For application notes see disclaimer on the last page