CTI Janus Programmable Automation Controller IOG
57
8.4
Event Log
The Event Log maintains a history of user actions, operational states, application settings, and system-level
errors that affect the controller operation. The Event Log is an extremely useful tool
for “post event” analysis
for determining the events leading up to an unexpected operation or error condition.
The Event Log record format includes the following data:
1)
Event Text / Event ID
2)
Project Name / Version Number
3)
Event Category Text / Category ID
4)
Record Creation Date / Session Number
5)
Update Time / Number Repetitions
6)
File / Line Number that Logged Event
The location of these fields in the Event Log record is shown below:
The Event Log records are also color-coded to aid in spotting startup and fatal error events. Startup messages
(logged immediately after boot) are GREEN (see above), and fatal error events are colored RED.
The Event Log also incorporates a filtering algorithm to detect duplicate messages. This prevents a single or a
series of repetitive actions (such as a toggling error state condition) from filling the Event Log. Any event that
is repeated within a one-
hour period causes an update to the ‘Timestamp’ and ‘Repetition Count’ (item 5
above) in the original record instead of creating a new record each time an event is detected.
