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How does Delta’s Hybrid Energy Saving System HES Series perform independent control and communication control for convergent flow?

Independent control:

The host controller sends analog commands separately to the drives and each HES system calculates the required output of flow and speed via the PID configuration function accordingly.

Communication control:

One of the HES systems is set as the Master and the rest are Slaves. Only the Master drive will receive commands from the host controller. Once the master drive receives a host controller command, it will perform PID configuration and send the required output of flow and speed to control the Slaves via RS485.
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