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5.6 Monitoring/Test
5.6.3 Confirmation of conversion characteristic
5
UTILITY PACKAGE (GX Configurator-AD)
(1) The following explains an offset value and a gain value.
(a) An offset value is an analog input value (voltage or current) that is con-
verted to 0 in digital output value.
(b) A gain value is an analog input value (voltage or current) that is con-
verted to the following digital output value.
400 (Normal resolution mode)
16000/12000 (High resolution mode)
(2) Satisfy the conditions below when setting an offset value and a gain value.
Note that they are different from the I/O characteristics of the A/D converter
module. (In case of the Q66AD-DG, the option for the analog/range setting is
"Current" only".
(a) When "Voltage" is selected for the analog/range setting
• Setting range of offset/gain values: -10 to 10V
• Depending on the range setting, adjust the offset/gain values as follows.
1) Normal resolution mode
{ (Gain value) - (Offset value)} > 1.5V
2) High resolution mode
{ (Gain value) - (Offset value)} > 4.0V
(b) When "Current" is selected for the analog/range setting
• Gain value 20mA, Offset value 0mA
• Depending on the range setting, adjust the offset/gain values as follows.
1) Normal resolution mode
{ (Gain value) - (Offset value)} > 5.5mA
2) High resolution mode
{ (Gain value) - (Offset value)} > 16.0mA
(3) Explanation of window command buttons
Analog value : <When converted to a digital value>
Enter an analog value to be converted to a digital value
<When converted to an analog value>
The analog value converted from a digital value is displayed.
Digital value : <When converted to a digital value>
The digital value corresponding to an entered analog value is
displayed.
<When converted to an analog value>
Enter a digital value to be converted to an analog value.
The entered offset/gain value is determined, and the I/O
characteristic diagram is updated.
Conversion for the entered value is performed.
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