SIMATIC PC Panel PC 677/877, Control Unit
Operating Instructions, Edition 04/2005, A5E00407724-01
6-1
Operation
6
6.1
6.1
Status displays
The two LEDs on the upper left hand side of the front panel display the operating mode:
•
LED "POWER" green: Active voltage.
•
LED "TEMP" orange: The temperature threshold has been exceeded, it is set in the
diagnostic software SIMATIC SOM Safecard on the motherboard.
For more information, please refer to the chapter "Additional drivers and applications" and to
the computer unit operating instructions.
6.2
6.2
Operator controls on key panels
6.2.1
Overview
The device has the following keypads:
•
2 x 8 vertical key with softkey functions
•
2 x 10 horizontal keys with function keys F1 -F20
•
Optional 32 direct key functions
The number of keys, their labeling and function is the same on all key panels. The various
panel types differ only in the arrangement of the keys and in the size and type of the display.
The following illustration shows as an example the front view of the 12" variant with the
display, the operating mode display, the individual keypads, the integrated mouse and the
front-sided USB 1.1 port.
