Sensor Interfaces receive messages from external sources through COM or network ports. Calculated Interfaces do not have source external to ACQ.
Calculated Interfaces use data from other sensors ("base sensors") and combine them to calculate new data values. A calculated item then constructs a message containing the derived values which appears to SCS to have come from an external physical device. The message can be logged and parsed into data fields as if it were coming from an external source. As such, Calculated Interfaces follow the same structure as normal Sensor Interfaces with an interface level, a message level and one or more field levels.
See also: Sensor Interfaces
There is a special type of calculated interface called SAMOS. These interfaces are automatically managed by the underlying SCS system and should be considered read-only. Any changes you make may be overwritten by the system at any time. Given that, in this version of SCS you no longer have to create nor maintain your SAMOS suite yourself, it is all automatically done for you.
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