Siemens SIMATIC PCS 7 Configuration Manual page 241

Operator prompts
Operator prompts are messages generated by the sequential control or stacking systems
which prompt the operator to perform certain tasks.
Operator messages
Operator messages indicate which tasks the operator has performed manually (e.g. "User xy:
control T4711: W was: 20 DEGC, W is now: 35 DEGC"). These can also be system-generated
messages which refer to events occurring in the system (e.g. "Incorrect password").
Status messages
Status messages provide information about system states during normal operation and also
document these states (e.g. "Logon via Smart card").
Adapting the default settings
The information below only concerns users who are forced to modify the system default
settings regarding colors and the acknowledgment theory in accordance with their
requirements or who have to configure their own messages in the alarm logging system, since
the S7 channel (Protocol Suite) is not used (e.g. TELEPERM M connection).
Assign a message class to each message during the configuration of the message system.
When doing this, you do not have to make the numerous settings for each message; you can
make the settings for the entire message class.
Up to 13 message classes can be defined in PCS 7. An acknowledgment mode is also specified
for each message class. In turn, message types can be defined within the individual message
classes. The text and background colors of a message are specified by its message class and
message type.
Up to 16 message types can be defined within one message class. Messages are broadly
divided into system-generated messages and messages containing information on the plant
status. The table below provides an overview of the recommended message classes and
message types. The solution here has been adapted to meet the requirements of the chemical
industry.
Message class
Interrupt (1)
Warning (2)
Tolerance (3)
AS process control messages
(4)
Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA
Message type
Top interrupt (1)
Bottom interrupt (2)
Top warning (19)
Bottom warning (20)
Top tolerance (37)
Bottom tolerance (38)
AS system (55)
I/O failure (56)
Acknowledgment Target group
Signal for new value Operators
with single acknowl‐
edgment
Signal for new value Operators
with single acknowl‐
edgment
Signal without ac‐ Operators
knowledgment
Signal for new value Operators (inform
with single acknowl‐ service person‐
edgment nel)
Configuring OS functions
10.3 Message system
Color
White/red
Black/yellow
White/blue
Yellow/black
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