Phoenix Contact RFC 4072S, User Manual, Page: 13 / 272

For your safety
108580_en_02 PHOENIX CONTACT
13 / 272
Observe startup behavior The PROFIsafe system and the RFC 4072S as the central component do not prevent auto-
matic startup/restart of the safety function. The user must program this independently in the
safety program using the programming software for PROFIsafe (PLCnext Engineer).
After the supply voltage is switched on or after a software reset, the RFC 4072S starts up
immediately if a parameterization memory with a valid project is plugged in and the operating
mode switch is set to RUN (see Section 2.12 ).
By selecting one of the options (“Write and Start Project…” or “Write and Start Project
Changes…”), the safety function becomes active immediately after downloading the
PLCnext Engineer project and following the RFC startup phase. The outputs of the F-
Devices and the non-safety-related PROFINET devices can be set in accordance with the
programming.
Safety notes for starting applications
Take the following into consideration when determining and programming the start condi-
tions for your machine or system:
– The machine or system may only be started if it can be ensured that nobody is present
in the danger zone.
– Meet the requirements of EN ISO 13849-1 with regard to the manual reset function. The
machine must not be set in motion and/or a hazardous situation must not be triggered
by the following actions, for example:
– Switching on safe devices
– Acknowledging device error messages
– Acknowledging communication errors
– Acknowledging block error messages in the application
– Removing startup inhibits for safety functions
Observe the following when programming/configuring the safety logic:
– Switching from the safe state (substitute value = 0) to the operating state can generate
an edge change (zero/one edge).
– In the safety logic, take measures to prevent this edge change resulting in unexpected
machine/system startup or restart.
Measures to prevent
mismatching and
polarity reversal
Take measures to prevent mismatching, polarity reversal, and manipulation of connections.
Observe the country-specific installation, safety, and accident prevention regulations.
Note for starting applications
Also observe these notes to prevent unexpected machine startup following acknowledg-
ment by means of operator acknowledgment.