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PHOENIX CONTACT
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A Appendix: glossary for PROFIsafe
A definition of PROFIsafe terms is also provided in the PROFIsafe profile.
Consecutive number
Method for ensuring that the safe data is transmitted completely and in the correct order.
CRC
Cyclic Redundancy Check
A cyclic redundancy check is used to verify the validity of the process data contained in the
safety telegram, check whether the assigned address relationships are correct, and verify
the safety-related parameters. This value is part of the safety telegram.
F-CPU
Failsafe controller, safe controller
F_Destination_Address
F-Parameter; PROFIsafe destination address; address of the safe device:
F-I/O device
Failsafe I/O device; safe input and/or output modules
Modules with integrated safety functions, which are approved for safety-related operation.
F-Parameter
(According to PROFIsafe system description, Version 09, November 2007)
F-Parameters contain information for adapting the PROFIsafe layer to customer
specifications and for checking the parameterization by means of a separate method
(diverse). The main F-Parameters are:
F-Slave
Failsafe slave
F-Source_Address
F-Parameter, PROFIsafe source address; address of the safe controller:
F_S/D_Address
(F-Address for
short)
A unique address for F-Devices within a PROFIsafe island. The
technology part of the F-Device compares the value with the
address switch locally or with an assigned F-Address in order to
check the authenticity of the connection.
F_WD_Time
Specifies the millisecond value for the watchdog timer. The timer
monitors the time that elapses until the next valid PROFIsafe
message is received.
F_SIL
Indicates the SIL that the user can expect from the relevant F-
Device. It is compared with the manufacturer's specification that is
stored locally.
F_iPar_CRC
A checksum that is calculated from all i-Parameters of the
technology-specific part of the F-Device.
F_Par_CRC
A CRC signature which is created via all F-Parameters and ensures
error-free transmission of the F-Parameters.
Summary of Contents for Axioline F
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