Siemens PC 870 - Manual (Page 22)

Description of Device
2-6
SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
Edition 07/01
2.2 Operating units with touchscreen front panels
The 12.1” version and the 15.1” version of the touchscreen front panels
differ in their dimensions and the size of their displays. The 12.1” ver-
sion does not have drill holes (covers) at the sides.
Figure 2-7 shows the 15.1” version as an example to illustrate the sta-
tus indicators, the USB interface and the display.
USB interface *)
*) not present on NEMA-standard front panels (see Appendix: Technical Data)
Display Status indicators
OK
Fig. 2-7 Example:15.1” operating unit with touchscreen front panel
The device is operated by touching the touch-sensitive display with
your finger in accordance with the functions displayed for that specific
application, e.g. by applying pressure to a displayed button.
Information about the operation status is supplied by the two LEDs at
the upper left side of the keyboard (see paragraph 2.1.1):
S The left LED (”POWER”) lights when the power supply works
S The right LED (”TEMP”) lights when a temperature threshold is ex-
ceeded (see “SOM–program” in chapter 7 of the “Computing Unit”
manual).
Operation
Status indicators