Glossary-5
ET 200L Distributed I/O Device
EWA-4NEB 780600902-05
P
Parameterization is the passing of slave parameters from the DP master to the
DP slave.
In contrast to static parameters, the dynamic parameters of modules can be
changed during operation by calling an SFC in the application program (e.g.
limit values of an analog signal input module).
In contrast to dynamic parameters, the static parameters of modules cannot
be changed by means of the application program; they can only by changed
by means of STEP 7 (not in RUN mode). An example is the input delay of a
digital signal input module.
A programmable logic controller consists of at least one CPU, a number of
input and output modules, and operating and monitoring equipment.
PROcess FIeld BUS, the German process and field bus standard defined in
the PROFIBUS standard (IEC 61784-1:2002 Ed1 CP 3/1). It specifies func-
tional, electrical and mechanical characteristics for a bit-serial field bus sys-
tem.
PROFIBUS is available with the following protocols: DP (= distributed I/O),
FMS (= Fieldbus Message Specification), PA (= Process Automation) or TF
(= Technological Functions).
Each bus node must have a PROFIBUS address (station number) so that it
can be identified uniquely on the PROFIBUS.
PC/PG or the ET 200-Handheld have the PROFIBUS address ”0”.
The PROFIBUS addresses 1 to 99 are permissible for the ET 200L distrib-
uted I/O device.
A draft standard (IEC 61784-1:2002 Ed1 CP 3/1) on which the ET 200 dis-
tributed I/O system is based.
R
The potential on the basis of which the voltages of the circuits involved can
be observed and/or measured.
Parameterization
Parameters, dy-
namic
Parameters, static
Programmable
logic controller
PROFIBUS
PROFIBUS ad-
dress
PROFIBUS-DP
Reference poten-
tial
Glossary