Different from ordinary digital quantity input terminals, virtual VDI state can have
two setting modes which is selected by E3.06.
When selecting VDI state is determined by the state of the corresponding virtual VDO,
VDI is valid or invalid state depending on the VDO output valid or invalid, and VDIx only
binding VDOx(x=1~5)
When choosing VDI state selection function code to set, through the binary bits of
E3.05, respectively determine the state of virtual input terminals.
Example of how to use VDI.
Example 1. Implement following function: “Inverter fault alarm and shuts down when
AI1 input exceeds upper or lower frequency” .
Realize by following settings: Set VDI state decided by VDO, set VDI1 function as
“ user defined fault 1” (E3.00=44); set VDI1 terminal state effective mode decided by
VDO1 (E3.06=xxx0); set VDO1 output function as “AI1 input exceeds upper & lower
frequency” (E3.11=31); so when AI1 input exceeds upper or lower frequency, VDO1 state
is ON, VDI1 input terminal state is effective, VDI1 receive user defined fault 1, inverter
then alarm fault no. 27 and shuts down.
Example 2. Implement following function: “Inverter run automatically after power-on”.
Realize by following settings: set VDI state decided by function code E3.05, set VDI1
function as “FORWARD” (E3.00=1); set VDI1 terminal state effective decided by function
code (E3.06=xxx1); set VDI1 terminal state is effective (E3.05=xxx1); set command source
as “terminal control” (F0.11=1); set protection selection as “no protection” (F7.22=0); so
after inverter powered on and initialization complete, VDI1 detected effective, and it match
forward running, then inverter starts running forwardly.
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