Function Application
‑556‑
Value
Function Description
41
Fault output 2 The DO outputs the active signal when an AC drive fault
(except the undervoltage fault) occurs.
42
Fault output 3 The DO outputs the active signal when an AC drive fault
occurs.
3.3.3 VDI Terminal
The virtual digital input (VDI) terminals, having the same functions as DIs on the
control board, can be used as multi‑functional digital input terminals.
There are three VDI terminal sources.
● A1‑06: Set A1‑06 to make the DI take effect. The DI is used in communication
scenarios, where physical DIs are not used. The relationship between the digits of
A1‑06 and the VDIs are as follows: the ones position of A1‑06 corresponds to VDI1...
the ten thousands position of A1‑06 corresponds to VDI5.
● DO state: There are two DOs, namely, DO1 and DO2. DO1 corresponds to VDI1, and
DO2 corresponds to VDI2.
● DI state: The relationship between the DIs and the VDIs are as follows: DI1 ‑ VDI1,
DI2 ‑ VDI2, DO1 ‑ VDI4, and DO2 ‑ VDI5.
Example
The following examples show how to use VDIs:
● Example 1: Assume that A1‑05 (VDI active state source) is set to 00001 (DO state is
the source). To enable the AC drive to generate an alarm and stop when the AI1
input exceeds the upper limit or lower limit, do as follows:
Step Parameter Setting
1
Set the VDI1 function to "user‑defined fault 1" (set A1‑00 to 44).
2
Set the DO1 function to "AI input limit exceeded" (set F5‑04 to 31).
3
Set the VDI1 state source to DO state (set A1‑05 to 00001).
After the preceding steps, DO1 output is in ON state, and the VDI1 input terminal is
active when AI1 input exceeds the upper limit or lower limit. After VDI1 of the AC
drive receives user‑defined fault 1, the AC drive generates the alarm E27.00 and
stops.
● Example 2: In a communication scenario, implement emergency stop through the
VDI without using physical DI.
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