B-2
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Control command
A DP master can send commands to one slave station, a group of slave
stations or to all slave stations in order to synchronize the slave sta-
tions.
The
³
FREEZE and
³
SYNC control commands are used to syn-
chronize slave stations event–driven.
The ET 200U(DP Standard) slave station responds to the FREEZE and
SYNC control commands.
CP 5410 S5–DOS/ST
Programmer interface module for connection to SINEC L2 and SINEC
L2–DP.
D
Diagnostics
Detection, location, classification, display, additional evaluation of
errors, faults and messages.
Diagnostics includes monitoring functions that are automatically ex-
ecuted during normal operation.
Application: Increasing the availability of a sytem/plant by cutting
start–up and idle times.
DIN 19245, Part 1
German process and fieldbus standard.
Part 1 specifies the bus access and transmission protocol and defines
the required transmission technique.
DIN 19245, Part 3
³
PROFIBUS–DP
Distributed I/O
Comprises the input/output modules connected in a distributed confi-
guration, i.e. at a distance from the CPU. The ET 200 is the distributed
I/O of the SIMATIC range. It includes the following distributed I/O
systems:
ET 200B,
ET 200C,
ET 200U or
third–party systems.
Distributed I/O station
³
Distributed I/O
DP Standard
DP Standard is the bus protocol of the ET 200 distributed I/O system,
based on the DIN 19245, Part 3 draft standard.
DP Siemens
DP Siemens is the bus protocol developed by Siemens. In cooperation
with the PROFIBUS User Organization, the bus protocol has been ex-
tended to an open multi–vendor system. This extended bus protocol
has been filed with the German Electrotechnical Commission (DKE)
and accepted as national draft standard DIN 19245, Part 3 (
³
DP
Standard ).
E
Earth
The conductive soil where the potential at all points can be assumed
equal to zero.
Earthing
Connecting an electrically conductive part to the earthing electrode via
the earthing system.
Earthing electrode
One or more conductive part(s) that make good contact with the earth.
Glossary