I/O Conversion Characteristics - Mitsubishi Electric MELSEC A Series Manual

3. SPECIFICATIONS
3.3

I/O Conversion Characteristics

Input/output (hereafter I/O) conversion characteristics are expressed by the angle of
the line connecting the offset value and gain value used to convert the analog
signals, input to the PC CPU, into digital values. This is shown in Figure 3.1 below.
Example : Resolution setting
Offset value
Gain value
4095
4000
2000
Digital output value 0
-2000
-4000
-4096
-15
Fig.3.1 I/O Conversion Characteristics
*1 Analog input value (voltage or current) corresponding to the digital output value
of "0"
*2 Analog input value (voltage or current) corresponding to the following digital
output values:
2000 with resolution setting of 1/4000
4000 with resolution setting of 1/8000
6000 with resolution setting of 1/12000
: 1/4000
: 0 V
: 5 V
Practical analog input range
-10 0
Analog input voltage (V)
3 − 3
MELSEC-A
Gain value *2
Offset value *1
10 15