User Manual

4
3. Feature setting
1. The output channel characteristics of the VC-4DA are the linear relationship between the channel analogue output quantity A and
the channel digital quantity D, which can be set by the user. Each channel can be understood as the model shown in Figure 3-1, and since
it is a linear characteristic, the characteristics of the channel can be determined by determining two points P0 (A0, D0) and P1 (A1,D1),
where D0 indicates that when the analogue output is A0 D0 indicates the channel output digital quantity when the analogue output is A0,
D1 indicates the channel output digital quantity when the analogue output is A1.
A 1
D
Channel Characteristics
D 0
A 0 D 1
P 1
P 0
A
Channel
A
Analog Output
D
Digital Inputs
Channel model
Figure 3-1 Schematic diagram of the channel characteristics of the VC-4DA
1) Considering the user's ease of use and not affecting the realization of the function, in the current mode, A0 and A1 correspond
to [measured value 1] and [measured value 2] respectively, D0 and D1 correspond to [standard value 1] and [standard value 2] respectively,
as shown in Figure 3-1, the user can change the channel characteristics by adjusting (A0,D0) and (A1,D1), the factory default (A0,D0) is
the 0 value of the output analog quantity, (A1,D1) is the maximum value of the output analog quantity
2) If the D0 and D1 values of each channel are not changed and only the mode of the channel is set, then the characteristics
corresponding to each mode are shown in Figure 3-2. A, B and C in Figure 3-2 are factory settings factory settings
(mV)
D
0
- 10000
- 10000
A
10000
A.Mode1,D0=0,D1=10000
10000
Input 10V corresponds to input digital 10000
Output 0V, corresponding to input digital quantity 0
Output -10v, corresponding to input digital -10000
- 2000
2000
D
- 2000
(mA)
A
2000
0
B.Mode 2, D0=0,D1=2000
Output 20mA corresponds to input digital quantity 2000
Output 0mA, corr esponding to input digital quantity 0