Status Page: Difference between revisions

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The midas documentation has moved. See [https://midas.triumf.ca/docs/develop/reference/reference/web_pages/#status-page Status page] in Built-in web pages and [https://midas.triumf.ca/docs/develop/features/core_system/web/ Web interface: overview] for the new documentation about the Status web page.
* [[Midas_documentation|Midas Documentation]]
* [[Feature_listing|Feature Listing]]
* [[Application_listing|Application Listing]]
* [[Online_Database|Online Database]]
</div>
 
= Links =
<div style="column-count:3;-moz-column-count:3;-webkit-column-count:3">
* [[Mhttpd|mhttpd MIDAS web server]]
* [[ODB Page]]
* [[Programs Page]]
* [[Alarms Page]]
* [[MSCB Page]]
* [[History Page]]
* [[Custom Page]]
* [[odbedit]]
</div>
 
= Purpose =
The purpose of the [[mhttpd]] status page is to allow the user to control and monitor the experiment.
 
= Access the status page =
To connect to the MIDAS web server [[mhttpd]] status page for an experiment see  [[mhttpd#Usage|Usage]]. An example of the status page is shown [[#Example Status Page|below]]. By default, if [[mhttpd]] is running, anyone can access the experiment through the web.
The user may set up web access restrictions to their experiment (see [[Security]]).
 
= Page Refresh =
It is important to note that the refresh of the Status Page is not "event driven" but is controlled by a timer whose rate is adjustable through the Config button. This means the information at any given time may reflect the experiment state of up to n seconds in the past, where n is the timer setting of the refresh parameter.
 
 
= Example Status Page =
[[File:status_page.png|Main status page of pol experiment]]
 
 
= Features of the status page =
The status page is divided into several parts
* Menu Buttons
** Run Control buttons
** Page Switch Buttons
** Optional (user-defined) buttons
* Run Status information
** Optional display of status items
** Optional Run Description and Comment
** Last system message
* Equipment Information and Event rates
* Data Logging Information
* Active client list
 
 
 
== Menu Buttons ==
The top row of Menu buttons on the main status page include the run control buttons (Start/Stop/Pause/Resume depending on the run state) and the page switch buttons (e.g. Messages, Elog, Alarms, Programs, History, Sequencer, MSCB, Help). Clicking on a page switch button will replace the Status page with the requested page. All the pages contain a Status button to return to the Status page. The ODB button allows the user to access and edit the ODB and the Config button allows the Status page refresh time to be changed.
 
Not all the available buttons may be visible on the main status page. For example, the MSCB button will only be visible if MSCB support has been built into Midas. Keys in the  [[/Experiment ODB tree]] controls which menu buttons are visible on the status page. The user may change these as required. The [[/Experiment ODB tree#Menu Buttons|Menu Buttons]] key lists the buttons to appear on the page. The Start/Stop buttons and Pause/Resume buttons may be suppressed using the [[/Experiment ODB tree#Start-Stop Buttons|Start-Stop Buttons]] and [[/Experiment ODB tree#Pause-Resume Buttons|Pause-Resume Buttons]] keys respectively.
 
== Optional Buttons ==
Below the Menu Buttons, there may be up to three rows of optional user-added buttons. These may include
* [[/Script ODB tree#Script-button|script-buttons]]
* [[Frontend user code#Manual Trigger|manually-triggered event]] buttons
* [[/Alias ODB tree#Alias-Button|alias-buttons]] and [[/Custom ODB tree#Custom-Button|custom-buttons]]
 
In the [[#Example|example]],
<span style="color: #444444; background-color: #CCCCCC; font-style:italic; font-size: 90; padding:0.25em;
padding-left: 0.5em;padding-right: 0.5em;border:1px solid #808080;border-radius: 5px;margin-bottom:1px;">test</span> is a script-button,
<span style="color: #444444; background-color: #CCCCCC; font-style:italic; font-size: 90; padding:0.25em;
padding-left: 0.5em;padding-right: 0.5em;border:1px solid #808080;border-radius: 5px;margin-bottom:1px;">ppg-cycle</span> is a custom-button, the other buttons on the line are all alias-buttons.
 
 
== Run Status Information ==
The run status information displays important information, such as the run status, alarm system status and data directory. The run may also be started/stopped using the button provided. The colour or information changes depending whether the run is active or not (e.g. run elapsed time or run stop time). By default, the experiment name is also shown here. The user may choose to display other useful information in this area (see [[/Experiment ODB tree#Status items subtree|Status items]].
 
The last item in this area is a one-line display of the last Midas message. More messages can be viewed on the Message page.
 
== Equipment Information ==
This area shows the status (by colour) of any  [[Frontend Operation#Equipments in Frontend|defined Equipments]] (unless [[/Equipment ODB tree#Hidden|hidden]]). If Hidden equipments are present, they may also be displayed by clicking on the "+" link above the equipment names.  This area also displays the number of events sent, the event rate and the data rate. These values are found in the [[/Equipment ODB tree#Statistics|Statistics subtree]] for each Equipment.
 
The names of the equipments
are links to the <span style="color: purple; font-style:italic;">/Equipment/<equipment-name>/Variables</span> subtree. If the Equipment sends data to the ODB (see [[/Equipment ODB tree#Log history|Log History]] and  [[Equipment List Parameters#ReadOn|RO_ODB flag]]), clicking on this link will display the contents of the  <span style="color: purple; font-style:italic;">/Equipment/<equipment-name>/Variables</span> subtree  with the name of each variable if the [[/Equipment ODB tree#<Names> subtree|<Names> subtree]] has been set up as shown below:
 
 
[[File:status_variables.png|Display of Info Equipment variables]]
 
 
== Logging Channels ==
This section contains a display of the status of open [[Keys in the /Logger/Channels ODB subtree#logging channels]], number of events logged, disk usage etc.
 
== Clients ==
The names of the clients currently running are listed in the clients' section.
 
[[Category:mhttpd]]

Latest revision as of 22:01, 30 October 2026

The midas documentation has moved. See Status page in Built-in web pages and Web interface: overview for the new documentation about the Status web page.

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