Mitsubishi Electric R60AD8-G - Page 46

44
1 FUNCTIONS
1.7 Input Signal Error Detection Function
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".
3. Set "Input signal error detection auto-clear enable/disable setting" to "Enable" or "Disable".
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.
Setting example
■Setting example of the input signal error detection
In the channel where the following values are set, an input error is detected when an analog input value exceeds 21.2mA or
falls below 0.4mA.
Assign the following values in a formula to determine the input signal error detection lower limit set value and input signal error
detection upper limit set value.
• Input signal error detection lower limit value: 0.4mA
• Input signal error detection upper limit value: 21.2mA
• Offset value: 4.0mA
• Gain value: 20.0mA
For details on the calculation formula, refer to the following.
Page 43 Setting the input signal error detection upper or lower limit value
Thus, set 'CH1 Input signal error detection lower limit set value' (Un\G529) to 225 (22.5%).
Thus, set 'CH1 Input signal error detection upper limit set value' (Un\G530) to 75 (7.5%).
Item Setting range
Input signal error detection lower limit setting value 0.0 to 25.0 (%)
Input signal error detection upper limit setting value
Item Setting value
Input range 4 to 20mA
'Input signal error detection auto-clear enable/disable setting' (Un\G302) Disable (1)
'CH1 Input signal error detection setting' (Un\G528) Upper and lower limit detection (1)
[Calculation of lower limit value]
=
= 225 (22.5%)
Input signal error detection lower limit
setting value
× 1000
4.0 - 0.4
20.0 - 4.0
[Calculation of upper limit value]
=
= 75 (7.5%)
Input signal error detection upper limit
setting value
× 1000
21.2 - 20.0
20.0 - 4.0