Safety instructions
TR-Electronic GmbH 2012, All Rights Reserved
Printed in the Federal Republic of Germany
Page 14 of 56
TR - ECE - BA - GB - 0095 - 19
05/30/2018
2.2 Safety functions of the fail-safe processing unit
The
F-Host
, to which the measuring system is connected, must perform the following
safety checks.
To enable the correct measures to be taken in the case of an error, the following
applies:
If no safe position can be output due to an error detected by the measuring system,
the PROFIsafe data channel is automatically put into fail-safe status. In this status
so-called "passivated data" are output via PROFIsafe. Also see the chapter
"Output of passivated data (substitute values) in case of error" on page 47.
Passivated data from the viewpoint of the measuring system are:
–
PROFIsafe data channel: all outputs are set to 0
–
PROFIsafe status:
error bit 2
1
Device_Fault
is set
–
PROFIsafe-CRC:
valid
Upon receipt of passivated data, the F-Host must put the system into a safe
state. It is only possible to leave this error state by eliminating the error and
then switching the supply voltage off and on again!
The process data channel addressable via PROFINET IO is not necessarily affected
by this. If the internal diagnosis in the master channel does not detect an error, the
process data are still output. However, these data are not safe for the purposes of a
safety standard.
2.2.1 Mandatory safety checks / measures
Measures for commissioning, changes
F-Host error reaction
Application-dependent parameterization and definition of the
necessary
iParameters,
see chapter "iParameters" on
–
In the event of parameter changes, check that the measure
is executed as desired.
STOP
Check by F-Host
F-Host error reaction
Cyclical consistency check of the current safety-oriented
data from the safety module in relation to the previous data.
STOP
Travel curve calculation and monitoring by means of cyclical
data from the safety module.
STOP
Monitoring of cyclical data from the safety module, and the
process data from the non-safety module.
Receipt of passivated
data --> STOP
Timeout: Monitoring of the measuring system - response
time. For checking e.g. cable breakage, power failure etc.
STOP
