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5 DETAILS AND SETTING OF FUNCTIONS
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Outline of alarm output function operation
The following gives the outline of the alarm output function operation.
• Example of alarm output operation
Upper/ upper limit value
Upper/ lower limit value
Lower/ upper limit value
Lower/ lower limit value
Alarm output flag
bit0 (Lower limit alarm)
bit8 (Upper limit alarm)
• Assuming that the upper/upper limit = upper/lower limit and lower/upper limit =
lower/lower limit, operation is performed as shown below.
Upper/ upper limit value
Upper/ lower limit value
Lower/ upper limit value
Lower/ lower limit value
Alarm output flag
bit0 (Lower limit alarm)
bit8 (Upper limit alarm)
POINT
• Since the "sampling pulse number" of the buffer memory is updated at intervals
of the count cycle setting value (refer to Section 5.1.4), the alarm output flag also
turns ON/OFF at the timing of the count cycle setting value.
• The settings are reflected on the module by turning ON the operating condition
setting request flag (Y1) after setting the values to the buffer memory.
Count cycle
ON
OFF
OFF
ON
OFF
OFF
MELSEC-Q
ON
ON
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