Chapter 5 CPU and Module Devices
5-33
Adjust D/A Conversion Curve
You can adjust the conversion curves according to the actual needs by changing the Offset value (CR#32 ~ CR#33) and
Gain value (CR#38 ~ CR#39).
Offset: The corresponding voltage/current input value when the digital output value = 0.
Gain: The corresponding voltage/current input value when the digital output value = 16,000.
Equation for voltage output Mode0:
( )
( )
×
+
−×
=
32000
)(10
16000
V
Offset
OffsetGainX
VY
Y=Voltage output, X=Digital input
Resolution: 0.3125mV = 20V/64,000
Equation for current output Mode1:
( )
( )
×
+
−×
=
32000
)(20
16000
mA
Offset
OffsetGainX
mAY
Current output, X=Digital input
0.625μA = 20mA/32,000
Equation for current input Mode2:
( )
( )
×
+
−×
=
32000
)(20
6400
16000
640019200 mAX
mAY
Current output, X=Digital input
0.5μA = 16mA/32,000
Mode 0 of CR#2 ~ CR#5
-10V ~ +10V, Default: Gain = 16,000（= ）, Offset = 0
Range of digital conversion
Max./Min. range of digital
-32,768 ~ +32,767
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