Siemens SIMATIC HMI TP 170A Equipment Manual page 100

Glossary
Message arrival
Time at which a message was triggered by the PLC or operating unit.
Message departure
Time at which a message was withdrawn by the PLC.
Message event
Message events consist of:
S Message arrival
S Message acknowledgement
S Message departure
Message indicator
A graphical symbol displayed on the operating unit when at least one alarm
message is present .
Message logging
Printout of alarm and event messages parallel to their display on the operating unit
display.
Multi Panel
Multi-functional, configurable operating unit with graphics display and Windows
CE operating system for operating and monitoring machines and systems.
Normal operation
Operating unit operating mode in which messages are displayed and screens can
be operated.
Glossary-4
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