Function Application
‑517‑
The frequency reference range set through communication is –10000 to +10000 (in
decimal), corresponding to –100.00% (negative max. frequency) to +100.00% (positive
max. frequency). Suppose that F0‑10 (maximum frequency) is set to 50 Hz. In this
case, if the frequency reference in write command is 2710H, which is 10000 in
decimal, the frequency reference that is written is 50 x 100% = 50 Hz.
3.1.2.9 Selecting an Auxiliary Frequency Source
The AC drive supports ten sources for the auxiliary frequency reference, including
digital setting (non‑retentive upon power failure), digital setting (retentive at power
failure), AI1, AI2, AI3, pulse input, multi‑reference, simple PLC, PID, and
communication. You can set F0‑04 to a value ranging from 0 to 9 to select a source.
When the auxiliary frequency reference is used independently for frequency setting, it
is set in the same way as the main frequency reference. The following figure shows
the logic block diagram. When the auxiliary frequency reference is used together with
the main frequency reference for frequency setting, see "Setting the Frequency Based
on Main and Auxiliary Frequency References".
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