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MELSEC-A
3 SPECIFICATION
3.3.3 Relationship between the offset/gain setting and digital output value
The relationship between the offset/gain setting and digital output value is described.
(1) Resolution
The resolution is obtained by the following formula:
(a) For the voltage input:
(Gain value) - (Offset value)
Resolution =
4000
(b) For the current input:
(Gain value) - (Offset value)
Resolution =
4000
(2) Relationship between the maximum resolution and digital output
value
The maximum resolution of the AJ65SBT-64AD is as indicated in the
performance specification.
If the following is satisfied from the offset/gain setting, the digital output value
does not increases /decreases by one.
(Gain value) - (Offset value)
4000
< Maximum resolution
3.3.4 Accuracy
Accuracy is relative to the maximum value of the digital output value.
If you change the offset/gain setting or input range to change the input characteristic,
accuracy does not change and is held within the range indicated in the performance
specifications.
Accuracy is within ±0.2% (±8 digit) at the operating ambient temperature of 25±5°C or
within ±0.4% (±16 digit) at the operating ambient temperature of 0 to 55°C.
4000
-10V 10V
-4000
0V
Digital output value
Analog input value
Varies within the range of
±0.2% (±8 digit) at operating
ambient temperature of 25±5 .
Varies within the range of
±0.4% (±16 digit) at operating
ambient temperature of 0 to 55 .
0
Fig. 3.3 Voltage Input Characteristic Accuracy