Siemens SIMATIC PC RI25 Manual page 27

Table 3-1
Power LED green
Disk LED
Run LED
Temp. LED green
Status When you switch on your PC, it automatically executes a self-test that tests
Display all of the important PC components for reliability performance. The
(7-Segment
diagnostics display of the SafeCard provides you with information about the
Display)
individual test steps. In case of an error, this display provides instructions for
troubleshooting. The "CPU Module" register in the Technical Description
provides you with an explanation of the possible displays.
Reset Key If you press the reset key with a pointed object (for example, the tip of a
ballpoint pin or the end of an opened paper clip), you trigger a hardware reset,
and you completely restart the PC.
SIMATIC PC RI25/45
C79000-G7076-C806-01
Setting Up and Operating Your PC RI25/45
Control LEDs
Power supply switched on
off Power supply switched off
green Lights up for a hard disk access
green Watchdog monitor switched on (only in
red connection with a SafeCard)
Monitoring time run out
Temperature in the device is normal (only in
red connection with a SafeCard)
Inner temperature is critical
3-3