CPU modules
4.2 CPU module CPU550/CPU551
SIMATIC TDC hardware
System Manual, 08/2017, A5E01114865-AL
93
Operating and fault states
User program is running
• Flashing "I": Initial error
• Static "I":
Sequential error after a lower priority error
The following errors are possible:
•
Cycle errors
A task could not be completed within the sampling time.
•
Task overflow
If a task that has not been not assigned top priority needs to be
restarted.
•
No free local buffer
The data buffer is no longer released. The task start will be
skipped.
•
Software time monitoring
If the basic sampling time is not processed four times in succes-
sion. The basic clock cycle timer is re-initialized with the config-
ured basic sampling time and processing is continued.
For more information on diagnostics functions, refer to the manual
"D7-SYS - STEP 7, CFC and SFC configuring
(http://support.automation.siemens.com/WW/view/de/8776786/0/en)",
chapter Basic software, section "Diagnostics".
Yes
User program is not running
Hardware or software problems causing a program crash.
• Flashing "H" Faults on this module
• Permanent "H": Faults on a different module
For more information on diagnostics functions, refer to the manual
"D7-SYS - STEP 7, CFC and SFC configuring
(http://support.automation.siemens.com/WW/view/de/8776786/0/en)",
chapter Basic software, section "Diagnostics".
No
To Next Page
Loading...
Need help?
General
