117
Adjusting Offset and Gain Section 3-7
Gain Adjustment The procedure for adjusting the analog input gain is explained below. As
shown in the following diagram, the gain is adjusted by sampling inputs so
that the conversion value is maximized.
The following example uses input number 1 adjustment for illustration. (The
unit number is 0.)
1,2,3... 1. Turn ON bit 01 (the Gain Bit) of CIO word n+1. (Hold the ON status.)
The analog input’s digital conversion values while the Gain Bit is ON will
be monitored in CIO word n+8.
2. Check whether the input devices are connected.
10 V0
0FA0
Input signal range:
0 to 10 V
Gain adjustment input range
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
1
B
MON
200101 ^ OFF
SET
200101 ^ ON
+
–
+
–
Voltage input
Input 1
Current input
Input 1
For current input, check that the voltage/
current switch is ON.
A1
A2
A5
A1
A2
A5
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