112
Adjusting Offset and Gain Section 3-7
3-7 Adjusting Offset and Gain
3-7-1 Adjustment Mode Operational Flow
The adjustment mode enables the input of the connected devices to be cali-
brated.
The offset voltage (or current) and gain voltage (or current) at the output
device are entered as analog input conversion data 0000 and 0FA0 (07D0 if
the range is
±10 V) respectively for a resolution of 4,000.
For example, when using in the range 1 to 5 V, the actual output may be in the
range 0.8 to 4.8 V, even though the specifications range for the external
device is 1 to 5 V. In this case, when an offset voltage of 0.8 V is output at the
external device, the conversion data at the Analog Input Unit for a resolution
of 4,000 will be FF38, and if a gain voltage of 4.8 V is output, the conversion
data will be 0EDA. The offset/gain adjustment function will, for this example,
convert 0.8 V and 4.8 V to 0000 and 0FA0 respectively and not to FF38 and
0EDA, as illustrated in the following table.
(Values in parentheses are for a resolution of 8,000.)
Offset/gain voltage at the
output device
Conversion data before
adjustment
Conversion data after
adjustment
0.8 V FF38 (FE70) 0000 (0000)
4.8 V 0EDA (0DB4) 0FA0 (1F40)
To Next Page
Loading...
