Mitsubishi Electric Melsec iQ-R Series User Manual page 45

Clearing input signal errors
After the analog input value falls within the set range, turn on and off 'Error clear request' (YF).
The A/D converter module arranges the following status when an input signal error is cleared.
• 'Input signal error detection flag' (Un\G40) is cleared.
• 'Input signal error detection signal' (XC) turns off.
• The ALM LED turns off.
• 'Latest alarm code' (Un\G2) is cleared.
Setting of the input signal error detection upper/lower limit value
Set the input signal error detection upper/lower limit values in increments of 1 (0.1%) based on the input signal error detection
setting value.
The input signal error detection setting value is reflected into both the input signal error detection upper/lower limit values.
■Input signal error detection upper limit value
This value is calculated by adding "Analog input range width (Gain value - Offset value)  Input signal error detection setting
value (%)" to the gain value. Only a value that is equal to or greater than the gain value can be set.
To calculate the input signal error detection setting value based on the input signal error detection upper limit value, use the
following formula.
• Input signal error detection setting value = ((In
Item
In
H
I
G
I
O
■Input signal error detection lower limit value
This value is calculated by subtracting "Analog input range width (Gain value - Offset value)  Input signal error detection
setting value (%)" from the lower limit value of each range. Only the value that is equal to or smaller than the lower limit value
of the range can be set.
To calculate the input signal error detection setting value based on the input signal error detection lower limit value, use the
following formula.
• Input signal error detection setting value = ((I
Item
I
L
In
L
I
G
I
O
The following table lists the lower limit value, offset value, and gain value for each range.
Input range
0 to 20mA
4 to 20mA
4 to 20mA (extended mode)
Setting method
1.
Select a detection method in "Input signal error detection setting".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Application setting]  [Input
signal error detection function]
2.
Set a value to "Input signal error detection setting value".
Item
Input signal error detection setting value
)  (I
- I
H G
Description
Input signal error detection upper limit value
Gain value of each range
Offset value of each range
)  (I
- In
L L
Description
Lower limit value of each range
Input signal error detection lower limit value
Gain value of each range
Offset value of each range
Lower limit value
0mA
4mA
4mA
))  1000
- I
G O
))  1000
- I
G O
Offset value
Setting range
0.0 to 25.0 (%)
1.9 Input Signal Error Detection Function
Gain value
20mA
20mA
20mA
1 FUNCTIONS
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