Siemens SIMATIC ET 200SP System Manual page 265

Safety mode
Operating mode of → F-I/O that enables → safety-related communication via → safety frames.
→ ET 200SP fail-safe modules can only used in safety mode.
Safety program
Safety-related user program
Safety-related communication
Communication used to exchange fail-safe data.
Self-assembling voltage buses
Two internal, self-assembling buses (P1 and P2) that supply the I/O modules with voltage.
SELV
Safety Extra Low Voltage
Sensor evaluation
There are two types of sensor evaluation:
→ 1oo1 evaluation – sensor signal is read once
→ 1oo2 evaluation – sensor signal is read in twice by the same F-module and compared
internally
Sensors
Sensors are used for accurate detection of digital and analog signals as well as routes,
positions, velocities, rotational speeds, masses, etc.
Server module
The server module completes the configuration of the ET 200SP.
SIL
Safety Integrated Level → safety class
Slave station
A slave can only exchange data after being requested to do so by the master.
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF
Glossary
265