Chapter 4 Analog Output Module AS04DA
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1. Enable/Disable a Channel
An analog signal is converted into a digital signal at a rate of 2 ms per channel. The total conversion time is
2 ms X (the number of channels). If a channel is not used, you can disable it to decrease the total
conversion time.
2. Calibration
To make a curve meet specific needs, calibrate the curve by changing the offset and the gain. The
calibration range depends on the range of inputs that the hardware can receive. The formula is:
Example:
A channel receives voltage inputs between -10.0 V to +10.0 V. The gain is 1000, and the offset is 0. The
corresponding value for the original signal -10.0 V to +10.0 V is -32000 to +32000. If you change the offset to -
100, the calibrated value for the original signal -10.0 V to +10.0 V becomes -31900 to +32100.
Digita l value (X)
3200 0 32100
S igna ls aft er t he ca libration
Original signals
-10V
-32 000
Voltag e (Y)
Analog sig nal
1 0V
-31900
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