Distributed I/O System ET 200S

Glossary
Configuration
Connecting to common potential
Device names
Diagnostics
Direct starter
The systematic arrangement of the different ET 200S modules (setup).
The opening of a new voltage group by a power module. This enables individual connection
of the sensor and load supply to common potential.
Before an IO device can be addressed by an IO controller, it must have a device name. This
procedure was selected for PROFINET because names are easier to handle than complex
IP addresses.
Assignment of a device name for a concrete IO device can be compared with the setting of
the PROFIBUS address for a DP slave.
An IO device does not have a device name upon delivery. An IO device can only be
addressed by an IO controller - i.e., for transferring configuration data (including the IP
address) during startup or for user data exchange during cyclic operation - after it has been
assigned a device name with the programming device/PC.
Diagnostics involves the identification, localization, classification, display, and further
evaluation of errors, faults, and messages.
Diagnostics provides monitoring functions that run automatically while the system is in
operation. This increases the availability of systems by reducing setup times and downtimes.
A direct starter is a → motor starter that switches a motor on and off directly. It consists of a
circuit breaker and a contactor.
Distributed IO systems
are input/output units which are not deployed in the central device, but which are set up
decentrally at a greater distance from the CPU, e. g.:
• ET 200M, ET 200X, ET 200L, ET 200S
• DP/AS-I Link
• Other DP slaves either from Siemens or other manufacturers
The distributed IO systems are connected to the DP master by means of PROFIBUS DP.
DP master
A→ master that acts in compliance with the IEC 61784-1:2002 Ed1 CP 3/1 standard is
termed
DP master.
ET 200S
Glossary-2 Manual, 12/2005, A5E00514527-03