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8.8 Input Signal Error Detection Extension Function
Using this function, the detection method of the input signal error detection function can be extended. Use this function
to detect an input signal error only at the lower or upper limit, or to execute the disconnection detection. To enable this
function, the input signal error detection function does not need to be enabled.
(1) Detection method
As well as the input signal error detection function, an error can be detected with input signal error detection
upper limit value and input signal error detection lower limit value.
For details on the setting procedure of input signal error detection upper limit value and input signal error
detection lower limit value, refer to the following.
• Input signal error detection function ( Page 69, Section 8.7)
The detection method can be selected from the following list:
Detection
method
Detection condition
Lower upper limit
detection
An error is detected above the input signal error detection
upper limit value or below the input signal error detection
lower limit value.
Lower limit
detection
An error is detected below the input signal error detection
lower limit value.
Upper limit
detection
An error is detected above the input signal error detection
upper limit value.
Disconnection
detection
Disconnection detection is performed. For details, refer to the following.
• Disconnection detection (
Page 75, Section 8.8 (1)(a))
Input signal error
detection upper
limit value
Input signal error
detection lower
limit value
Analog
input value
Time
Error
detection
Error
detection
Input signal error
detection upper
limit value
Input signal error
detection lower
limit value
Analog
input value
Time
Error
detection
No error
detection
Input signal error
detection upper
limit value
Input signal error
detection lower
limit value
Analog
input value
Time
Error
detection
No error
detection