Festo SFC-LAC CO Series, Manual

Page: 183 / 328

6. Diagnosis and fault display
6−13
Festo P.BE−SFC−LAC−CO−EN en 0708NH
6.4 Diagnostic memory
The diagnostic memory contains the last 16 diagnostic mess
ages. It is backed up if possible in the event of power failure.
If the memory is full, the oldest element will be overwritten
(ring buffer).
Structure of the diagnostic memory
Parameters
1)
CO / CI 20C8
h
PNU 200
CO / CI 20C9
h
PNU 201
CO / CI 20CA
h
PNU 202
Format uint8 uint16 uint32
Meaning Diagnostic event Fault number Time stamp
Subindex 1 Current diagnostic message
Subindex 2 Previous diagnostic message
... ...
Subindex 16 Oldest diagnostic message
1)
see appendix B.2.5
Tab.6/7: Diagnostic memory: Structure
Configuration of the diagnostic memory with parameter CO /CI 20CCh (PNU 204)
SI Description Specifi
cation Min. Max.
1 = 1: Record incoming and outgoing
*)
faults
= 2: Record only incoming faults
*)
outgoing fault = quit the fault
1 1 2
2 = 1: Resolution time stamp 10 ms
= 2: Resolution time stamp 1 ms 1 1 2
3 Deleting the diagnostic memory
Writing with value = 1 deletes the diagnostic memory.
Read will always reply with value = 1. 0 0 1
4 Read out the number of entries in the diagnostic memory. 0 0 16
Tab.6/8: Diagnostic memory: Configuration