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L
Loop-through
Operating mode of the TP. It covers normal operation and also handles com-
mode
munication between a PU or PC and the PLC via the TD. This operating mode
is only possible when connection to the PLC is made via the AS511 protocol.
M
Message log
Printout of alarm messages and event messages simultaneously with their out-
put to the display.
N
Normal mode
Operating mode of the TP during which messages can be displayed and screens
can be controlled by the operator.
O
Output field
Field for displaying a setpoint.
P
Password,
To control a protected function, a password of a specific password level has to
Password level
be entered. The password level determines the privileges of the operator. The
requisite password level can be configured, 0 being the lowest level and 9 the
highest.
PLC
Generic term for devices and systems with which the TP communicates – for
example, SIMATIC S5/S7 or PCs).
PLC job
Function triggered by the PLC.
Printout
Output of the contents of the display to an attached printer.
Process screen
Representation of process values and process sequences in the form of screens,
which may contain graphics, pieces of text and values.
TP27, TP37 Equipment Manual
Release 01/00
Glossary
Glossary-3
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