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Configuration
Figure 19 – Block diagram of an example of physical connection of Modbus devices to the iRIS
Note
the actual type communications daughter(s) board fitted to the give iRIS may vary.
There are three main application of the master/slave topology that can be used on the iRIS:
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Data Collection
– the iRIS acts as a master and the sensor(s) act as slaves.
§
Data Source
– The iRIS acts as slave and another system which acts as a master. The iRIS provides scaled measurements
obtained from its physical channels (e.g. Analogue, digital and SDI-12 inputs) to the master.
§
Protocol Gateway
– the iRIS acts as a slave to another system which acts as a master. Information is passed between
the host (e.g. HydroTel) and the Master via the iRIS. In addition, the iRIS can act as a data source to both the Modbus
host and the base.
