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Analog Input Units
Section 5-1
Adjusting Offset and Gain
Use the following procedure to adjust the offset and gain settings. The
DeviceNet and the MULTIPLE I/O TERMINAL must be connected first.
Note
1.
The offset and gain can be adjusted only with a Configurator Ver. 1.20 or
later.
2.
With the earlier model GT1-AD08MX Analog Input Unit, the offset and gain
cannot be adjusted, even with a Configurator Ver. 1.20 or later. Check the
label on the front on the Unit for whether the offset and gain can be adjust-
ed. Offset and gain can be adjusted only if the letter B appears on the label
as shown below.
Offset Adjustment
Offset adjustment is used to adjust inputs so that when the value correspond-
ing to 0% in the input range is input, it is converted accurately to 0%. Offset
adjustment is used when input voltage and input current differ from the actual
value of 0% due to the features of the Unit or the method of connection being
used.
The possible range of offset adjustment depends on the input range. Refer to
the following table.
If the input corresponding to 0% is outside the range of possible adjustments
shown in the above table, check the connection to the input device.
Gain Adjustment
Gain adjustment is used to adjust the rate of fluctuation of input conversion
values so that when the value corresponding to 100% in the input range is
input, it is converted accurately to 100%. Gain adjustment is used when the
greater the input voltage and input current, the greater the difference from the
Input range
Input corresponding to 0%
Adjustment range
0 to 10 V
0 V
–0.5 to 0.5 V
–10 to 10 V
–10 V
–11.0 to –9.0 V
1 to 5 V
1 V
0.8 to 1.2 V
0 to 5 V
0 V
–0.25 to 0.25 V
4 to 20 mA
4 mA
3.2 to 4.8 mA
0 to 20 mA
0 mA
–1.0 to 1.0 mA
E.g.: Input range is 0 to 10 V
Conversion data
Hexadecimal
(Decimal)
After adjustment
Voltage
Before adjustment
0 V
Summary of Contents for DRT1-COM
Page 1: ...OPERATION MANUAL Cat No W348 E1 05 DRT1 COM GT1 Series DeviceNet MULTIPLE I O TERMINAL ...
Page 2: ...DRT1 COM GT1 Series DeviceNet MULTIPLE I O TERMINAL Operation Manual Revised May 2003 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 233: ...DRT1 COM GT1 Series DeviceNet MULTIPLE I O TERMINAL Cat No W348 E1 05 OPERATION MANUAL ...