Siemens PC 870 manual Operating units with key-based front panels, Status indications

Description of Device

2.1Operating units with key-based front panels

The number of keys, their labeling and their functionality are identical on all operating units featuring key-based front panels. The various ty- pes of front panel differ only in the arrangement the keys and the size and type of display. Figure 2-1 shows the front view of the 12º version as an example to illustrate the status indicators, the different keypads, the USB interface, display and mouse.

Status indicators Function keys/soft keys Alpha, numeric, cursor and control keys

Display

USB interface Integrated mouse

Fig. 2-1 Example: 12º version of the operating unit with key-based front panel

2.1.1Status indications

Information about the operation status is supplied by the two LEDs at the upper left side of the keyboard:

￿The left LED (ºPOWERº) lights when the power supply works

￿The right LED (ºTEMPº) lights when a temperature threshold is ex- ceeded (see ªSOM±programº in chapter 7 of the ªComputing Unitº Manual).

2-2	SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
	Edition 07/01