Siemens SIMATIC S7-1200 Safety Programming Manualline page 46

5 Glossary
RIOforFA
RIOforFA (Remote IO for Factory Automation) is a standard from the PROFIBUS &
PROFINET International organization. Among other features, it describes the
following functions:

Synchronous provision of channel-specific diagnostics of remote IOs for high
performance

Channel-specific passivation and reintegration of PROFIsafe remote IOs
Feedback circuit
A feedback circuit is used for monitoring controlled actuators (e.g., relays or load
contactors) with positive-action contacts or mirror contacts. The outputs can only
be activated when the feedback circuit is closed. When using a redundant
shutdown path, the feedback circuit of both actuators must be evaluated. For this
purpose, they may also be connected in series.
Reset function / resetting
When a safety function has been triggered, the system must remain in stop until it
returns to a safe state for restarting.
Restoring the safety function and clearing the stop command is referred to as the
reset function / resetting.
In this context, "acknowledging the safety function" is another frequently used
phrase.
Safety program
Part of the safety program that processes safety-related tasks.
STEP 7 Safety Basic / Advanced
STEP 7 Safety Basic and Advanced are STEP 7 option packages that allow you to
configure F-CPUs and create a safety program.

STEP 7 Safety Basic allows you to configure the fail-safe SIMATIC S7-1200
controllers.

STEP 7 Safety Advanced allows you to configure all fail-safe SIMATIC
controllers.
Safety Programming Guideline
Entry ID: 109750255, V1.0, 10/2017
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