Siemens OP15, Equipment Manual, Page: 28 / 177

3-2
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
You change the operating level
from message level to screen level by pressing the ENTER key,
from screen level to message level by pressing the ESCAPE key.
Figure 3-1 illustrates how you can change from one operating level to another.
You cannot branch backward from the message level by pressing ESCAPE. The
key is designed to terminate the display of a system message at this level.
⇓
⇑
ENTER
Figure 3-1 Changing between Message Level and Screen Level
You exit from the screen level automatically whenever a system message or
an alarm message is waiting to be displayed. The OP then changes to mes-
sage level to display the message. You cannot exit from the message level
while a system message or unacknowledged alarm message is being dis-
played. The display of an unacknowledged alarm message is indicated on the
OP by the
– alarm message flashing and
– lit ACK LED.
You acknowledge an alarm message by pressing the ACK key. You hide a
system message by pressing the ESCAPE key.
Once the alarm message has been acknowledged or the system message
cleared, the OP returns to the point from which it changed to the message
level.
Changing operat-
ing levels
Forced change to
message level
Using the OP with Its Standard Functions