Advanced LIGO Conlog was introduced. The full presentation is available in the DCC. The document number is G1401113.

Some highlights:

* It provides a means to access historical values of control settings. This is accomplished by monitoring and recording EPICS process variables to a database. Searches on this database are made available through a web form and command line client.

* It is designed to retrieve values at a given instant, or changes over an interval (as opposed to continuous trends like dataviewer).

* It can help answer questions like: "I know it was working before, what changed?".

* It is currently available only on the internal CDS network. The web page is at 'h1conlog'. The command line client is called 'conlog_search'.

* There are three different search types available:
1. Return the value, alarm status and alarm severity at a given time:
The value, alarm status and alarm severity of each process variable at the given time is returned.

2. Compare the value, alarm status and alarm severity at two given times:
If the value, alarm status or alarm severity of a process variable differed at two given times, the differences are returned.

3. Find changes in the value, alarm status and alarm severity between two given times:
If the value, alarm status or alarm severity of a process variable changed between two given times, the changes are returned.

* Its status is indicated on an medm screen named CONLOG. This screen can be accessed from the sitemap under the CDS menu.

Please give it a try and don't hesitate to inform me of any issues that you encounter.