Front View With Closed Front Door - Siemens SIMATIC Rack PC 840 Manual

Welcome to the SIMATIC Rack PC 840
2.1

Front View with Closed Front Door

Figure 2-1 Front View with Closed Front Door
1 Front Panel
The front panel has openings for device ventilation. A filter mat and the fans are
located behind this front panel. It can only be removed when the front door is open.
Please check the filter mat regularly for dirt and replace it if necessary.
2 LEDs
The LEDs show the operating mode of the device:
FAN
TEMP
WATCHDOG
ETHERNET
PROFIBUS/MPI
HARDDISK
POWER
2-2
1
red CPU does not start or fan speed is too low.
The fan status is only displayed when SOM or SOL is
enabled.
red Inner temperature is critical.
Check the filter mat or contact the Customer Support.
green Watchdog monitoring is switched on.
red Monitoring time has run out.
off Watchdog is not activated.
green Data traffic
off No data traffic or no connection
green Data traffic at Profibus DP
off No data traffic at Profibus DP or no connection to
Profibus DP
green Lights up when hard disk is being accessed
yelllow Standby, PC is in hibernate mode.
green Power, PC is in operating mode.
off Mains plug is removed.
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SIMATIC Rack PC 840 Manual
A5E00104826-03