Siemens SIMATIC HMI TP 170A Equipment Manual page 101

Operator Panel
Operating unit which can be configured for operating and monitoring machines and
systems.
Output field
Displays current values from the PLC on the operating unit.
Password
A character string which must be entered on the operating unit before a protected
function can be activated. Each password is assigned to a password level.
Password level
Defines the user's rights. The rights are in hierarchical steps from Level 0 (lowest
level) to Level 9 (highest level). The password level linked to the password
allocates the rights to execute functions on the operating unit belonging to that
level or lower.
PCL
Hewlett Packard (Printer Control Language).
PCMCIA
Personal Computer Memory Card International Association
Joint operation of computer companies with the aim of defining one international
standard for memory cards and PC expansion cards. Cooperation with JEIDA.
PLC
General term for units and systems with which the operating unit communicates
(e.g. SIMATIC S7 or PC).
PLC job
PLC jobs can be used by the PLC to trigger functions on the operating unit, e.g.
display a screen.
TP 170A Equipment Manual
Release 12/99
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Glossary
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