Appendix 11 Accuracy - Mitsubishi Electric R60AD8-G User Manual

Appendix 11
A/D conversion accuracy
A/D conversion accuracy is the accuracy of the maximum digital operation value. The accuracy is calculated by the following
calculation formula.
Accuracy = (Reference accuracy) + (Temperature coefficient)  (Temperature change amount)
• Reference accuracy: Accuracy in the ambient temperature when the offset/gain value is set (0.1% (32 digit))
• Temperature coefficient: Accuracy per 1 temperature change (0.0035%/ (1.12 digit))
Even when the offset/gain setting and analog input range are changed and the output characteristics are changed, the
reference accuracy and temperature coefficient are not changed and the performance specifications are still satisfied.
(Excluded when the wiring is influenced by noise.)
Ex.
Accuracy when the temperature changes by 5 (from 25 to 30)
(0.1%) + (0.0035%/  5) = 0.1175% (38 digit)
digit
32000
0
-32000
-10
digit: Digital operation value
V: Analog input value (V)
(1) Fluctuation range
Accuracy in a SIL2 analog input system
When the R60AD8-G is used in SIL2 mode, the R60AD8-G (Main) and R60AD8-G (Sub) are configured, and digital operation
values obtained from these two modules are compared for evaluation. An allowable error in this evaluation is the accuracy in
a SIL2 analog input system.
An allowable error in evaluation can be set in the range of 0.5 to 5.0% in "Duplex input error range setting" in "Application
setting". ( Page 281 Double input discrepancy detection function)
APPX
328

Appendix 11 Accuracy

Accuracy
0
(1)
V
10