Operating the C7-613
5-5
C7-613 Control System
A5E00138934-03
the basic screen. From here, you branch to other screens, depending on the
configuration.
In screens you can
• View current process values,
• Enter values,
• Trigger functions via softkeys.
The linking of individual screens is referred to as the screen hierarchy
(see Section 4.7). If you go deep into the screen hierarchy, you can use the ESC
key to return one level at a time until you reach the initial screen (for the ESC
function, see Section 5.1). The numbers of the screens which you have selected
are stored in a screen memory. The screen memory can be deleted by means of
the Job Request 51, screen number 254 decimal (FE hex) (refer to Section 4.5.3).
If you have assigned an initial screen, you cannot branch to the standard/special
screens using the basic screen. In order to access special screens, you have
specify the selection of the desired special screens on the softkeys or cursor by
means of the configuration interface in your process screens. Accessing the
standard screens is not possible.
Changing the operating level
To change the operating levels:
• From the screen level to the message level using a function key (K-key).
To accomplish this, in your user program, place control job 51 for changing to
the “Select message level” special screen (screen number 253 decimal,
FD hex) on one of the function keys.
Pressing the
ESC key several times will also take you from the screen level to
the message level (see description of the ESC key in Section 5.1),
• From the message level to the screen level by pressing the
ENTER .
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