Omron M1 Series User Manual page 535

7 Other Functions
Input terminal [AI1] can be used with bipolar inputs (-10 V to 10 V) by setting Input Terminal [AI1] Po-
larity Selection (C35) to "0."
When Input Terminal [AI1, AI2] Bias for 1st Frequency Command (F18) and Input Terminal [AI1, AI2]
Bias Analog Input for 1st Frequency Command (C50) are both set to "0," the command becomes sym-
metrically inverted as shown in the figure below.
Set frequency
Input Terminal [AI1]
B point
Gain（Command） (C32)
-10 V
Terminal AI1 input
Input 10 V
Terminal [AI1]
Gain (Analog Input) (C34)
When Input Terminal [AI1, AI2] Bias for 1st Frequency Command (F18) and Input Terminal [AI1, AI2]
Bias Analog Input for 1st Frequency Command (C50) are set to an arbitrary value (e.g. points A1, A2,
A3), each of the values are limited by bias values as shown in the figure below.
Set frequency
7
A point
1
A point
2
Terminal AI1 input
-10 V 10 V
A point
3
Data can be input as negative polarity by analog inputs of 0 points or less by setting C40 = 10, 11 at
input terminal [AI2] (AII), C45 = 0 at input terminal [AI2] (AIV), and the bias value to a negative value.
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M1 Series Standard Type User's Manual (I669)