16
AMP(H)41_MANUAL-en_R11 - 2019-03-28
Absolute Encoder AMP(H) 41
2.5
Safety functions of the fail-safe processing unit
The F-Host, to which the measuring system is connected, must perform the following safety
checks.
NOTES!
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.
See chapter 9.1 "Output of passivated data (substitute values) in case of
error" on page 75.
Passivated data outputs are:
–
PROFIsafe data channel: all 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 PROFIBUS 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.
2.5.1
Mandatory safety checks / measures
Measures for commissioning, changes
F-Host error reaction
Application-dependent parameterization and definition of the
necessary
iParameters,
see chapter 7.1 “iParameter”
–
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
JHG-PROFIsafe
module in relation to the previous
data.
STOP
Travel curve calculation and monitoring by means of cyclical
data from the
JHG-PROFIsafe
module.
STOP
Monitoring of cyclical data from the
JHG-PROFIsafe
module, and the process data from the
JHG-PROFIsafe
module.
Receipt of passivated
data
STOP
Timeout: Monitoring of the measuring system - response time.
For checking e.g. cable breakage, power failure etc.
STOP
Summary of Contents for AMP 41
Page 96: ...96 AMP H 41_MANUAL en_R11 2019 03 28 Absolute Encoder AMP H 41 16 3 T V certificate...
Page 97: ...Absolute Encoder AMP H 41 AMP H 41_MANUAL en_R11 2019 03 28 97 16 4 PROFIBUS DP certificate...
Page 98: ...98 AMP H 41_MANUAL en_R11 2019 03 28 Absolute Encoder AMP H 41 16 5 PROFIsafe certificate...
