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MELSEC-Q
3 SPECIFICATIONS
(b) Alert delay count setting
The system is set in the alert status when the process value (PV) that has
reached the alert set value remains in the alert range until the sampling
count becomes equal to or greater than the preset number of alert delays.
The setting of alert delay count is made by the alert delay count (buffer
memory address: 165).
Example: When the number of alert delays set to the input upper limit alert
is 5, the system is not placed in the alert status if the sampling
count is 4 or less.
Time
Measured value (PV)
Temperature set value (SV)
Input sampling
Measured value (PV)
Alert set value
Alert status
3 times 5 times
Non-alert status Alert status
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