Mitsubishi Electric Q64AD2DA User Manual page 50

4
FUNCTION
Table 4.3 Lower limit values, offset values, and gain values calculated by setting input ranges
Input
Voltage
Current
(4) Setting examples of the Input signal error detection
[Setting example]
4
- 14 4.2 Function Details of A/D Conversion
4.2.5 Input signal error detection function
The following table shows lower limit values, offset values, and gain values
calculated in setting input ranges.
Analog input range
0 to 10V
0 to 5V
1 to 5V
-10 to 10V
1 to 5V (Extended mode)
0 to 20mA
4 to 20mA
4 to 20mA (Extended mode)
To detect an input signal error when the analog input value is 2.4mA or less, which is
for the analog input range of the channel is set to 4 to 20mA.
(a) Set CH1 Input signal error detection setting value (Un\G21).
The setting values will be turned out when the following values are assigned to the
calculating formula of the input signal error detection lower value described in (3)
of this section.
• Input signal error detection lower limit value: 2.4mA
• Lower limit value of input range (offset value): 4.0mA
• Gain value: 20.0mA
Input signal error
detection setting value
Therefore, use "100 (10.0%)" for the setting of CH1 Input signal error detection
setting value (Un\G21).
Lower limit value Offset value
0V
0V
1V
-10V
1V
0mA
4mA
4mA
4.0 - 2.4
=
20.0 - 4.0
= 100(10.0%)
Gain value
0V 10V
0V 5V
1V 5V
0V 10V
1V 5V
0mA 20mA
4mA 20mA
4mA 20mA
1000