Siemens simatic hmi op27 Equipment Manual page 227

Glossary
Process screen Representation of process values and process sequences in the form of screens,
which may contain graphics, pieces of text and values.
S
Screen
Form of displaying logically associated process data which may be shown col-
lectively on the OP and modified individually.
Screen entry Element of a screen, consisting of the entry number, text and variables.
Selection field Field for the value setting of a parameter (one value can be selected as the de-
fault value).
Startup test
Checks the state of the CPU and memories every time the power supply volt-
age is turned on.
System message Calls attention to internal states on the OP and on the PLC.
Glossary-4
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OP27, OP37 Equipment Manual
Release 05/99