This shows both the field-mounted process control Variable Frequency Drive and an interactive SVG SCADA drawing of the associated Variable Frequency Drive with a strip chart. Both VFDs are connected to the Data Stream Network.
The Process Control VFD is publishing its values to the Data Stream Network and the SCADA VFD is subscribing to those values.
Sequence Of Operation:
Every two(2) seconds the Process Control VFD is publishing its Controller Input (CI) signal, its Hertz (HZ) and Voltage (VAC). The SCADA Variable Frequency Drive then inserts the published values into the strip chart.
Status Pilot Lights:
This monitors the control circuitry at the VFD, showing it is OK.
This monitors the control circuitry at the VFD, showing it has alarmed and has shut down the VFD.
This shows that the VFD is operating properly with a control signal making changes to the pump's speed.
This shows the VFD is defective, and shutdown for maintenance.