DataSources

DataSources represent a communication channel with a PLC or PLC emulator. For specific details, please see the documentation for the specific DataSource type that you are interested in.

General Properties

Most DataSource properties are specific to that specific datasource type. There are, however, a few properties they have in common:

Name	Description
Name	A unique name that identifies this DataSource.
Type	The specific type of this DataSource. OPC DA, OPC UA, Mitsubishi, etc.
Comment	A message that is saved. This has no effect, it is for you to put DataSource specific notes, warnings, etc.
Sub-System	The Sub-System that this DataSource is associated with; exporting that Sub-System will mean that this DataSource will be in the exported
Auto Connect	If enabled (the default), then when tags are being read (upon starting the simulation in Integrator or starting the server in Operator) Sym3 will attempt to connect to this DataSource and read the tags. However, if the device on the other end of the DataSource is disabled (PLC is disconnected, etc) this will delay start up while Sym3 tries to read tags from the invalid DataSource. In that case, disabling Auto Connect will cause Sym3 to skip any tags associated with this DataSource, speeding up start up. Of course, those tags will not have values.