Mitsubishi MELSEC iQ-F, User Manual

Page: 49 / 182

4 FUNCTIONS
4.9 Input Signal Error Detection Function
47
4
Detection method
One of the following detection methods can be selected.
Detection method Detection condition
0: Disable Input signal errors are not detected.

1: Upper and lower limit
detection An input signal error is detected when the
analog input value is equal to or greater
than the input signal error detection upper
limit value, or when the analog input value
is equal to or smaller than the input signal
error detection lower limit value.
2: Lower limit detection An input signal error is detected when the
analog input value is equal to or smaller
than the input signal error detection lower
limit value.
3: Upper limit detection An input signal error is detected when the
analog input value is equal to or greater
than the input signal error detection upper
limit value.
4: Simple disconnection
detection Simple disconnection detection is performed. For details, refer to the following.

Page 48 Simple disconnection detection
Input signal error
detection upper limit value
Input signal error
detection lower limit value
Analog input value
Time (t)
Error
detection
Error
detection
Analog input value
Time (t)
Error
detection
No error
detection
Input signal error
detection upper limit value
Input signal error
detection lower limit value
Analog input value
Time (t)
Error
detection
No error
detection
Input signal error
detection upper limit value
Input signal error
detection lower limit value