Channels are the bridge between PyDM Widgets and the different Data Plugins provided.

Usually channels are specified in the following format:

<protocol>://<channel address>

Where protocol is a unique identifier for a given Data Plugin used with PyDM and channel address will vary depending on the data plugin. Every plugin should document the expected address format for users.

Here are some examples:


Where ca means the Channel Access plugin and MTEST:Float is the PV name in this case.

Another example is the Archiver Appliance plugin in which channels are specified as:


In which everything in the channel address section is the same as what is sent to the retrieval part of the Archiver as specified at the Retrieving data using other tools section of the Archiver Appliance User Guide