Supervision and Data acquisition tools.
Arian instruments send continuouslly data (e.g. temperatures,
counts, positions of valves) to a PC by means of a single
wire pair across the plant.
How it works|
Each instrument haves the optional RS485 isolated output
By other side, from the software point of view, the
instruments use the Modbus RTU protocol for exchanging
data with the PC thru the RS485 bus.
What is needed to start up communicating|
- Each of the devices must have installed RS485 comunications option.
ISO485 interface Data Sheet
Arian Opc Server V4 User Manual
Arian Opc Server V4 Software Free download for Windows
- Galvanic isolation of instruments from the bus and from the bus to the PC.