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PROFIsafe Terms Used in the Application Description
DOK-CONTRL-ILPSDO8****-AW04-EN-P
Bosch Rexroth AG
Rexroth Inline Module with Safe Digital Outputs R-IB IL 24 PSDO 8-PAC
12 PROFIsafe Terms Used in the Application Description
Some of the terms that are used in connection with PROFIsafe in this application
description are described below.
A definition of PROFIsafe terms is also provided in the PROFIsafe profile.
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.
Consecutive number
Method for ensuring that the safe data is transmitted completely and in the correct
order.
F-CPU
Failsafe control system, safe controller
F_Destination_Address
F-Parameter; PROFIsafe destination address; address of the safe device
(see also
)
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 specific
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
(see also
)
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 iParameters 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.