Glossary - Siemens Simantic ET200SP System Manual

Glossary

1oo1 evaluation
Type of → sensor evaluation – in the case of the 1oo1 evaluation, there → is one sensor with
a 1-channel connection to the F module.
1oo2 evaluation
Type of → sensor evaluation – in the case of 1oo2 evaluation , two input channels are
assigned one two-channel sensor or two one-channel sensors. The input signals are
compared internally for equivalence or nonequivalence.
Acknowledgment time
During the acknowledgment time, the → F-I/O acknowledge the sign of life specified by the →
F-CPU. The acknowledgment time is included in the calculation of the → monitoring time and
→ response time of the overall fail-safe system.
Actuator
Actuators are, for example, power relays or contactors for switching on load devices or load
devices themselves (e.g. directly controlled solenoid valves).
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.
AUX bus
Self-assembling bus, can be used individually, for example, as a protective conductor bus or
for additional required voltage.
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 s ame measuring
point.
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Distributed I/O system
System Manual, 12/2016, A5E03576849-AG