Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 49

[Operation after an alarm was output]
After an alarm was output, if the digital operation value does not satisfy the alarm output condition due to being smaller than
the process alarm upper lower limit value or being greater than the process alarm lower upper limit value, Normal (0) is stored
in a bit position corresponding to the channel number of 'Warning output flag (Process alarm upper limit)' (Un\G36) or
'Warning output flag (Process alarm lower limit)' (Un\G37).
In addition, when all the bits of 'Warning output flag (Process alarm upper limit)' (Un\G36) and 'Warning output flag (Process
alarm lower limit)' (Un\G37) return to Normal (0), 'Alarm output signal' (Un\G69, b8) turns off and the ALM LED turns off.
However, the alarm code stored in 'Latest alarm code' (Un\G2) is not cleared. To clear the alarm code, turn offonoff 'Error
clear request (Un\G70, b15)' after all the bits of 'Warning output flag (Process alarm upper limit)' (Un\G36) and 'Warning
output flag (Process alarm lower limit)' (Un\G37) return to Normal (0).
■Detection cycle
When time average is specified, the function works at every interval of the time (for averaging). When count average is
specified, the function works at every count (for averaging).
When the sampling processing, moving average, or Primary delay filter is specified, this function works every conversion
cycle.
■Detection target for outputting an alert
When the digital clipping function, scaling function, shift function, or difference operation function is used, the digital operation
value to which digital clipping, scale conversion, shift-and-add, or difference conversion is performed is the detection target for
outputting an alarm. Set values for CH1 Process alarm upper upper limit value (Un\G514), CH1 Process alarm upper lower
limit value (Un\G516), CH1 Process alarm lower upper limit value (Un\G518), and CH1 Process alarm lower lower limit value
(Un\G520) while considering the digital clipping, scale conversion, shift-and-add, and difference conversion.
■Setting procedure
1.
Set "Warning output setting (Process alarm)" to "Enable".
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Module Parameter] 
[Application setting]  [Warning output function (Process alarm)]
2.
Set values for "Process alarm upper upper limit value", "Process alarm upper lower limit value", "Process alarm lower
upper limit value", and "Process alarm lower lower limit value". The setting range is from -32768 to +32767.
Set values within the range satisfying the condition Process alarm upper upper limit value  Process alarm
upper lower limit value  Process alarm lower upper limit value  Process alarm lower lower limit value. If a
value out of the range is set, a process alarm upper lower limit value setting range error (error code: 1BH)
occurs.
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1 FX5-4AD
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1.4 Functions