Mitsubishi MELSEC Q Series User Manual page 53

3 SPECIFICATIONS
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(2) Rate alarm
(a) If the digital output value sampled at intervals of the rate alarm warning
detection period indicated a varying rate equal to or greater than the rate
alarm upper limit value or a varying rate equal to or less than the rate alarm
lower limit value, the warning output flag (buffer memory address 48:
Un\G48) and warning output signal (X8) turn ON and the ALM LED is lit to
indicate the warning of the rate alarm.
(b) If, after the output of the warning, the varying rate fell below the rate alarm
upper limit value or rose above the rate alarm lower limit value and returned
to within the setting range, "0" is stored into the bit position corresponding to
the channel number of the warning output flag (buffer memory address 48:
Un\G48).
The warning output signal (X8) turns OFF only when all channels return to
within the setting range.
MELSEC-Q
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