Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 368

Setting the input signal error detection upper or lower limit value
■Input signal error detection upper limit value
Set the input signal error detection upper limit value by 1 (0.1%) based on the input signal error detection upper limit set value.
This value is calculated by adding "Analog input range width (Gain value - Offset value)  Input signal error detection upper
limit set value (%)" to the gain value. Only a value which is equal to or greater than the gain value can be set.
To calculate the input signal error detection upper limit set value based on the input signal error detection upper limit value,
use the following formula.
Input signal error detection
upper limit setting value
■Input signal error detection lower limit value
Set the input signal error detection lower limit value by 1 (0.1%) based on the input signal error detection lower limit set value.
This value is calculated by subtracting "Analog input range width (Gain value - Offset value)  Input signal error detection
lower limit set value (%)" from the lower limit value of each range. Only the value which is equal to or smaller than the lower
limit value of the range can be set.
To calculate the input signal error detection lower limit set value based on the input signal error detection lower limit value, use
the following formula.
Input signal error detection
lower limit setting value
The following table lists the lower limit value, offset value, and gain value for each range.
Input range
Voltage 0 to 10 V
0 to 5 V
1 to 5 V
-10 to +10 V
Current 0 to 20 mA
4 to 20 mA
-20 to +20 mA
Setting procedure
1.
Select a detection method in "Input signal error detection setting".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Module Parameter] 
[Application setting]  [Input signal error detection function]
2.
Set values for "Input signal error detection lower limit setting value" and "Input signal error detection upper limit setting
value".
Item
'CH1 Input signal error detection lower limit setting value' (Un\G529)
'CH1 Input signal error detection upper limit setting value' (Un\G530)
In the channel where a value out of the range is set, an input signal error detection setting value range error
(error code: 1C1H) occurs.
3.
Set "Input signal error auto-clear enable/disable setting" to "Enable" or "Disable".
3 FX5-8AD
366
3.4 Functions
Input signal error detection upper limit value - Gain value of each range
=
Gain value of each range - Offset value of each range
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
0 V
0 V
1 V
-10 V
0 mA
4 mA
-20 mA
Offset value
0 V
0 V
1 V
0 V
0 mA
4 mA
0 mA
Setting range
0.0 to 25.0 (%)
× 1000
× 1000
Gain value
10 V
5 V
5 V
10 V
20 mA
20 mA
20 mA