Siemens Simatic MP 377 Operations Instructions Page 327

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Glossary
MP 377, MP 377 PRO (WinCC flexible)
Operating Instructions, 10/2008, 6AV6691-1DR01-0AB0
327
Screen
Form of the visualization of all logically related process data for a plant. The visualization of
the process data can be supported by graphic objects.
Screen object
Configured object used to display or operate the plant, e.g. rectangle, I/O field or alarm view.
STEP 7
STEP 7 is the programming software for SIMATIC S7, SIMATIC C7 and
SIMATIC WinAC PLCs.
STEP 7 Micro/WIN
STEP 7 Micro/WIN is the programming software for SIMATIC S7-200 PLCs.
Symbolic I/O field
A symbolic I/O field is a field for the input and output of the value. Contains a list of default
entries from which one can be selected.
System alarm
A system alarm is assigned to the "System" alarm class. A system alarm refers to internal
states on the HMI device and the PLC.
Tab sequence
During configuration, this defines the sequence in which objects are activated on
pressing the <TAB> key.
Tag
Defined memory location to which values can be written to and read from. This can be done
from the PLC or the HMI device. Based on whether the tag is interconnected with the PLC or
not, we distinguish between "external" tags (process tags) and "internal" tags.
Transfer
Transfer of a runtime project from the configuring PC to the HMI device.
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