Ny-Series Instructions Reference Manual (W560 - Omron NY532-5400 Reference Manual

Operation of Upper Deviation Alarm QH
Upper deviation alarm QH is the alarm for an upward deviation in respect to reference value Y. The
value of QH changes as shown below. You can set the hysteresis to prevent hunting in the deviation
alarm.
• If Input value X − Reference value Y > Upper deviation set value H, then QH is TRUE.
• If Input value X − Reference value Y < Upper deviation set value H − Hysteresis EPS, then QH is
FALSE.
Upper deviation alarm QH
Operation of Lower Deviation Alarm QL
Lower deviation alarm QL is the alarm for a downward deviation in respect to reference value Y. The
value of QL changes as shown below. You can set the hysteresis to prevent hunting in the deviation
alarm.
• If −(Input value X − Reference value Y) > Lower deviation set value L, then QL is TRUE.
• If −(Input value X − Reference value Y) < Lower deviation set value L − Hysteresis EPS, then QL is
FALSE.
Lower deviation alarm QL

NY-series Instructions Reference Manual (W560)

Input value X
Upper deviation set value H
Reference value X
TRUE
FALSE
Input value X
Lower deviation set value L
Reference value X
TRUE
FALSE
2 Instruction Descriptions
Hysteresis EPS
Time
Hysteresis EPS
Time
2
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