Siemens OP7 Equipment Manual page 105

If you press the "Tank2" soft key, the entry displayed in figure 11-4 appears.
This entry contains static text and two output fields (Tank Contents and Set
Temperature) as well as an input field (Valve Position) The position of the
tank valve can be set in the input field by means of a symbolic value input –
for example, OPEN or CLOSED).
Figure 11-4 Screen with Input and Output Fields (Example)
Equipment Manual OP7, OP17
Release 04/99
Tank2
Contents: 371 liters
Temp.: 17,0 C
Valve: OPEN >>
11-5