Status Displays - Siemens SIMATIC Rack PC 840 V2 Getting Started

2.1.4

Status displays

Status displays
Display
FAN
TEMP
WATCHDOG
ETHERNET
PROFIBUS/MPI Display of the communication
HARDDISK
POWER
SIMATIC Rack PC 840 V2
Getting Started, Edition 04/2004, A5E00248069-02
Meaning
CPU fan status (available only
with active SOM or DiagMonitor
software)
Internal temperature monitoring
WATCHDOG status display
ETHERNET status display
status to the S7 or PROFIBUS
Display for hard disk access
PC status display
LED Description
OFF -Fan speed OK
RED -CPU not started
(see error dialog)
-Fan speed too low
(see error dialog)
OFF -Internal temperature OK
RED -Internal temperature is critical
(see error dialog)
OFF -WATCHDOG disabled
GREEN -WATCHDOG monitoring enabled
-Time-out (see error dialog)
RED
OFF -not connected
-no data transfer
GREEN -data transfer
OFF -not connected
-no data transfer
GREEN -data transfer
OFF -no access
GREEN -access
OFF -disconnected from mains
YELLOW -Standby (hibernate)
GREEN -PC in operation
Description
2.1 Design
2-5