LX3V-4DA module
9
WECON Technology Co., Ltd.
Gain value: Analog output value when the digital input is +1,000;
Offset value: Analog output value when the digital input is 0;
When the slope of the I/O characteristic line is steep: slight changes to the digital input will greatly
increase or reduce the analog output.
When the slope of the I/O characteristic line is gentle: slight changes to the digital input will not
always change the analog output.
2)
Adjustment of I/O Characteristics
To adjust the I/O characteristics, set the offset and gain of the LX3V-4DA either using push button
switches connected to input terminals of the programmable controller or using the forced on/off
function of a programming panel. To change the offset and gain, just change the conversion constants
of the LX3V-4DA. Metering of the analog output is not needed for adjustment; however a program
should be created in the MPU.
An example program for adjustment is shown below. The example shows that for channel CH2 of
LX3V-4DA block No.1, the offset value is changed to 7 mA, and the gain value to 20 mA. Note that for
CH1, CH3, and CH4.
