35 CPU MODULE BUILT-IN ANALOG FUNCTION
35.4 Functions (Analog Output)
593
35
2. Set the warning output upper limit value and warning output lower limit value.
Warning output upper limit value and warning output lower limit value can be set for each channel that uses the warning
output function.
3. Enable the warning output setting.
Operation
The judgment to output a warning is based on the resulting value after shift processing is performed on the digital input value.
The warning output upper limit value flag turns ON for the corresponding channel when the input digital value exceeds the
warning output upper limit value, and the warning output lower limit value flag turns ON when the input digital value is less
than the warning output lower limit value.
Details of the warning output upper limit value flag are shown in the table below.
Details of the warning output lower limit value flag are shown in the table below.
The set warning output upper and lower limit values are used as the digital values for D/A conversion when there is a warning.
After a warning occurs and the digital value becomes less than the warning output upper limit value or greater than the
warning output lower limit value, the analog output value returns to the normal value. However, the warning output upper limit
flag, warning output lower limit flag, D/A conversion alarm occurrence flag, and alarm code stored in "D/A conversion latest
alarm code" are not cleared.
The following describes the procedure to clear the warning output.
After setting the digital value to a value smaller than the warning output upper limit value or larger than the warning output
lower limit value, turn on and off the D/A conversion alarm clear request.
• When using the scaling function and shift function, the digital value resulting from scaling and shift additions becomes the
detection target for outputting a warning. Make sure to set the warning output upper limit and lower limit values with regard
to scaling and shift additions.
• A warning will be output when the digital value exceeds the warning output upper limit value or when the digital value is less
than the warning output lower limit value.
Name Allowable setting range Default value
Warning output upper limit value -32768 to +32767
(Upper limit value > Lower limit
value)
0
Warning output lower limit value
Name Allowable setting range
Warning output upper limit value flag 0: Normal
1: Upper limit alarm ON
Name Allowable setting range
Warning output lower limit value flag 0: Normal
1: Lower limit alarm ON
To Next Page
Loading...
