D/A Conversion I/O Characteristics - Mitsubishi Electric A1S66ADA User Manual

3 SPECIFICATION

3.3 D/A Conversion I/O Characteristics

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The I/O characteristic of D/A conversion will be explained below.
(1) I/O conversion characteristic
The I/O conversion characteristic refers to the angle produced by a straight line
connecting the "offset value" and "gain value" created when the digital values set
by the PLC CPU are converted to analog values (voltage or current).
(2) Offset value and gain value
Offset value and gain value are defined as follows:
(a) Offset value···The current value or voltage value that is output from the A1S66ADA
(b) Gain value·····The current value or voltage value that is output from the A1S66ADA
(3) I/O conversion characteristic
Examples of A1S66ADA's I/O conversion characteristic are shown below.
When the offset value is -10V and gain value is 10V
(V)
10
5
0
-5
-10
Offset value
When the offset value is 0 mA and gain value is 20 mA
(mA)
10
5
0
-5
-10
Offset value
when the digital value set by the PLC CPU is "0."
when the digital value set by the PLC CPU is "4000."
0
Digital input value
Voltage output characteristic
0
Digital input value
Current output characteristic
2000
2000
MELSEC-A
Gain value
4000
Gain value
4000
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