Siemens SIMATIC HMI TP 070 Equipment Manual page 75

Output field
Displays current values from the PLC on the operating unit.
PLC
General term for units and systems with which the operating unit communicates
(e.g. SIMATIC S7 or PC).
Process screen
The display of process values and process progress on the operating unit in the
form of screens, which may contain graphics, texts and values.
Programmable system
PLC from the SIMATIC S7 series (SIMATIC S7-200/300/400).
RS485
Standard interface for serial data transfer at a very high transmission rate.
Screen
A screen displays all the logically related process data on the operating unit,
whereby the individual values can be modified.
TP 070 Equipment Manual
Release 03/00
Glossary
Glossary-3