4-133
(1)
Analog Input Level Adjustment AI1, AI2 (04-02, 04-03, 04-07, 04-08)
Each analog input AI1and AI2 has a separate gain and bias parameter associated with it.
Analog input signal AI1 can be adjusted with parameter 04-02 and 04-03; Analog input signal AI2 can be adjusted
with parameter 04-07 and 04-08. Refer to Figure 4.3.35.
+10V
AI 1
AI 2
GND
-10V
0 - 10V, -10V - +10V
0 - 10V / 0 - 20mA
4 - 20mA / 2 -10V
[
[
I
V
SW2
04-00 (Level Selection)
04-02 (Gain)
04-03 (Bias)
{
04-00 (Level Selection)
04-07 (Gain)
04-08 (Bias)
{
Related
Parameters
Figure 4.3.35 Analog inputs and related parameters
Gain setting:
Sets the level in % that corresponds to a 10V, -10V or 20mA signal at the analog input.
(Set the maximum output frequency 01-02 to 100 %)
Bias setting:
Sets the level in % that corresponds to a 0V or 4mA signal at the analog input.
(Set the maximum output frequency 01-02 to 100%)
Use both gain and bias setting to scale the input signal.
Gain: 200%
Gain: 100%
200%
100%
10V
(20mA)
0V
(4mA)
-100%
-200%
-10V
Terminal
AI1,AI2
analog input
Frequency
Reference
+100%
-
100%
10V
(20mA)
-
10V
0V
(4mA)
Bias = positive
Bias = 0%
Bias = Negative
Terminal
AI1,AI2
analog input
(a)
Gain
(b)
Bias
Frequency
Reference
Figure 4.3.36 Gain and bias operations (for frequency reference signal)
(2)
AI1 signal filtering time
(04-01)
(3)
AI2 signal filtering time
(04-06)
All analog inputs (AI1, AI2) have a 1
st
order programmable input filter that can be adjusted when noise is present
on each of the incoming analog signal to prevent erratic drive control.