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Access to the safety-oriented data channel
9.4 Passivation and reintegration of the measuring system
9.4.1 After start-up of the F-System
After a start-up of the F-System, the communication between F-CPU and measuring
system via the PROFIsafe protocol must first be established. A passivation of the
measuring system occurs during this time.
During use of the substitute values (0), the variables QBAD, PASS_OUT, QBAD_I_xx
and QBAD_O_xx = 1.
The reintegration of the measuring system, i.e. the output of cyclical data at the failsafe
outputs, automatically occurs, from the viewpoint of the F-Host, independently of
the setting at the ACK_NEC variable, at the earliest from the 2nd cycle of the
F-Runtime Group after start-up of the F-System. Depending on the cycle time of the
F-Runtime Group and the PROFIBUS-DP, the reintegration can only occur after a few
cycles of the F-Runtime Group.
If the establishment of communication between F-CPU and measuring system takes
longer than the monitoring time set in HW Config in the Object Properties for
the F-Periphery, no automatic reintegration occurs.
In this case a user acknowledgement with positive edge of variable ACK_REI of the
F-Periphery-DB is required, which is linked to the input of the digital input module -->
I 16.0, symbol name: "RESET"
9.4.2 After communication errors
If the F-System detects an error in the safety-oriented communication between the
F-CPU and measuring system via the PROFIsafe protocol, a passivation of the
measuring system occurs.
During use of the substitute values (0), the variables QBAD, PASS_OUT, QBAD_I_xx
and QBAD_O_xx = 1.
The reintegration of the measuring system, i.e. the output of cyclical data at the failsafe
outputs, only occurs if:
● no further communication errors are present, and the F-System has set the
variable ACK_REQ = 1
● a user acknowledgement with positive edge of variable ACK_REI of the
F-Periphery-DB has occurred, which is linked to the input of the digital input
module --> I 16.0, symbol name: "RESET"
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