ABB AC500-S Safety User Manual page 391

"Bus cycle In tab "PLC Settings" , you can set a global bus cycle task for I/O bus and communication
task" module by assigning a task. The default value "unspecified" of "Bus cycle task" assigns the
task with the smallest cycle time.
To use the global bus cycle assignment, go to tab "I/O-Bus I/O Mapping" for I/O bus or to tab
"PROFINET-IO-Controller I/O Mapping" / "PROFINET-IO-Device I/O Mapping" for communica-
tion modules. Go to "Bus cycle task" and choose "Use parent bus cycle setting" (default).
If you do not want to use the global task assignment, you can individually assign a configured
task: Choose an appropriate task in "Bus cycle task" .
"Stop on error Parameter in tab "CPU-Parameters Parameters" of non-safety CPU.
class"
Value "Diagnosis of at least error class 2" (default)
If an error of severity level 1 or 2 occurs, non-safety CPU and safety CPU will be stopped. If
present on the given safety CPU, PROFIsafe F-Host and F-Device stacks continue running on
the safety CPU with fail-safe values.
Value "Diagnosis of at least error class 3"
If an error of severity level 1, 2 or 3 occurs, non-safety CPU and safety CPU will be stopped. If
present on the given safety CPU, PROFIsafe F-Host and F-Device stacks continue running on
safety CPU with fail-safe values.
Value "Diagnosis of at least error class 4"
If an error of severity level 1, 2, 3 or 4 occurs, non-safety CPU and safety CPU will be stopped.
If present on the given safety CPU, PROFIsafe F-Host and F-Device stacks continue running on
safety CPU with fail-safe values.
2020/06/19
NOTICE!
The value of safety CPU parameter "Update cycle time" is the limitating bus
cycle time for I/O bus and communication modules. If higher values for the bus
cycle tasks are assigned for I/O bus and communication module, they will be
limited to the lower value of "Update cycle time" . If lower values for the bus
cycle tasks are assigned for I/O bus and communication module, they will be
kept as they are.
NOTICE!
The cycle times for I/O bus and communication modules may affect the SFRT of
Ä Chapter 5.3 "Safety function response time" on page 317.
your system
3ADR025091M0208, 12, en_US
Usage of safety CPU with V3 non-safety CPU PM56xx
391