Glossary
Glossary-2
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
Chassis ground
Chassis ground refers to all the interconnected inactive parts of a piece of
equipment that, even in the event of a fault, cannot carry voltage that is
dangerous to the touch.
Clock synchronism
With clock synchronism, all cycles concerned (e.g. user program cycle, DP bus
cycle, signal conditioning cycle in the modules of the DP slaves) run in common
mode and with identical length. As a result, the process response times are of
the same length and reproducible.
Configuration
Assignment of modules to racks/slots and addresses. A distinction is drawn
between the actual configuration (= modules actually inserted) and the desired
configuration. You can specify the desired configuration using STEP 7,
COM PROFIBUS (or COM ET 200 Windows). This way the operating system
can detect any incorrectly installed modules at
startup.
Configuration modification in RUN
With a configuration modification in RUN it is possible to carry out certain
configuration modifications while a system is still in operation. Processing is
stopped for just a few seconds. During this time the process outputs retain their
current values which has virtually no effect on processing sequences in
process-oriented systems.
A configuration modification in RUN is only possible with distributed I/Os.
CPU
Central processing unit of the S7 programmable controller with open and
closed-loop control systems, memory, operating system and interface for
programming device.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com