Mitsubishi Electric Q68AD-G User Manual page 47

3
SPECIFICATIONS
(8)Setting example of input signal error detection
Example) To detect an input signal error when the analog input value falls below
Apply the following values to the calculation formula for an input signal error detection
lower limit value.
Input signal error detection
setting value
Therefore, Set 100 (10.0%) as an input signal error detection setting value.
The input signal error detection values act as follows in this case. (Because of the set-
ting value of 100 (10%), an error is detected not only at 2.4mA but also at 21.6mA.)
Input signal error detection
upper limit value
21.6mA
Offset value 20mA
Gain value 4mA
2.4mA
Input signal error detection
lower limit value Error
2.4mA in the channel where the input range of 4 to 20mA (extended
mode) and the normal resolution mode is set
• Input signal error detection lower limit value: 2.4mA
• Lower limit value of the input range (offset value): 4.0mA
• Gain value: 20.0mA
Lower limit value of each
range
=
Gain value of each range
Input signal error detection
-
upper limit value
- Offset value of each range
Error
3.2 Function List
3.2.3 Input signal error detection function
1000
1.6mA
(10.0 of 1.6mA)
16mA
(Gain value - Offset value)
1.6mA
(10.0 of 1.6mA)
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