LG Industrial Systems G3F-DA4I, User Manual

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Chapter 2. SPECIFICATIONS
2 - 7
2.5 Input/Output Conversion Characteristics
I/O characteristics are displayed as a slant of the line connecting offset value and gain value in converting an
digital signal from the external PLC into an analog signal(voltage or current).
The I/O conversion characteristics of the D/A conversion module are shown.
2.5.1 Offset/ Gain Value
1) Offset and gain value is as follows
a) Offset value
Data format of -8192
～
8191: When digital input value is -8000, offset value is analog output value.
Data format of -192
～
16191: When digital input value is 0, offset value is analog output value.
b) Gain value
Data format of -8192
～
8191: When digital input value is 0, offset value is analog output value.
Data format of -192
～
16191: When digital input value is 8000, offset value is analog output value.
2) Factory set value of offset and gain value is like table 2.4.
Module name Analog input range Offset value Gain value
G3F-DA4I DC 4
～
20 mA DC 4 mA DC 12 mA
G3F-DA4V -10
～
10 VDC -10 VDC 0 VDC
G3F-DA1A -10
～
10 VDC -10 VDC 0 VDC
[Table 2.4] Factory set value of offset and gain
3) Offset and gain value can be selected per channel on test mode.
2.5.2 Example for I/O Conversion Characteristic.
Input/ output conversion characteristic example is shown on Fig 2.1
[Fig 2.1] Input/ output conversion characteristic example