Siemens simatic hmi op7, Equipment Manual

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4-1
Equipment Manual OP7, OP17
Release 04/99
Using the OP with Its Standard Functions
Once the operating voltage has been connected, you have to load a configura-
tion into the OP so that you can operate it. The OP is in Download mode un-
til a configuration is loaded.
The configuration software supplied to you, ProTool, includes a configuration
which contains standard screens. You can choose all the functions required
for operating the OPs by using these standard screens. The different functions
are described in this manual with reference to the standard screens.
4.1 Operating Levels
In OP operation, you have to distinguish between two distinct operating le-
vels, between which you can switch:
Message level
The message level is the highest level on the OP. At message level, wai-
ting event messages, alarm messages and system messages are displayed.
After the OP starts up, it changes to message level if
– a system message or an alarm message is waiting to be displayed
– a start screen has not been defined in the configuration. In this case,
the OP displays the standby message (refer to section 7.1.1).
– Screen level
At the screen level, functions are chosen, serviced and executed. If a
start screen has been defined in the configuration, the OP changes to
screen level after it starts up and calls the start screen. From the start
screen you branch, depending on the configuration, to other screens.
On the screens, you view current process values, can enter values and
initiate functions by means of soft keys.
The linking of individual screens is referred to as a ”screen hierarchy”. If you
go to the bottom of the screen hierarchy, you go back one stage by pressing
key
ESC
, right back to the start screen should you wish. From here you can
return to the message level by pressing the
ESC
key. You can also return
directly to the message level from a screen, depending on the configuration.
Loading a
configuration
Using standard
screens
Message level and
screen level
Screen hierarchy
4