Glossary - Siemens SIMATIC CFU Commissioning Manual

Glossary

"Switch off at signal level" parameter
Select the signal level at which the digital outputs are to be switched off.
Settings:
● High
● Low
Actuator
Actuators can be power relays or contactors for switching on loads, or they can be loads
themselves (e.g., directly controlled solenoid valves).
Actuator shutdown
The actuator shutdown is a function that allows digital outputs DO to be set to a digital low level
via a monitoring channel (DI channel) of the CFU. This is done directly by the CFU without
coordination through the CPU.
Automation system
Programmable logic controller for the open-loop and closed-loop control of process sequences
of the process engineering industry and manufacturing technology. The automation system
consists of different components and integrated system functions depending on the automation
task.
Availability
Availability is the probability that a system is functional at a specific point in time. Availability can
be increased by redundancy, e.g., by using multiple -> sensors at the
same measuring point.
Bus
Joint transmission path to which all nodes of a bus system are connected.
BusAdapter
Enables free selection of the connection technology for the PROFINET fieldbus.
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD
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