System Messages - Siemens simatic hmi op7 Equipment Manual

7.1.3

System messages

Definition
Serious and non-
serious system
messages
Inhibiting system
messages
System message
buffer
7-6
System messages indicate operating states within the OP. For example, they
draw your attention to maloperations or a breakdown in communication. This
message type has top display priority. If a relevant fault occurs on the OP, the
active event message or alarm message is removed from the display and a
system message is issued in its place.
After the system message has been hidden, the OP returns to the point from
which it branched.
System messages are classified as serious and non-serious system messages.
A serious system message is based on an error that can be rectified only by a
cold or warm restart of the OP. All other errors generate a non-serious system
message – for example, when printing has been initiated but a printer has not
been connected to the OP.
If the display of a non-serious system message is not automatically
canceled after a short while, you can do so manually by pressing
this system key.
Display of a non-serious system message can also be canceled automatically
when a configured display time has expired.
A list of possible system messages and their explanations will be found in the
appendix B of this manual.
Display of system messages (with the exception of internal errors 7xx) can be
inhibited at the configuration stage. System messages whose display has been
inhibited continue to be inserted into the system message buffer and thus can
be viewed on the display later.
The system message buffer can store up to 100 messages. System messages
are inserted into it with their message number and their arrival; their depar-
ture is not recorded. Some minor errors and operator errors are not logged in
the system message buffer. Messages from the system message buffer are
displayed in the same order as they arrived, i.e. first in first out, last in last
out.
ESC
Equipment Manual OP7, OP17
Release 04/99