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b. HI/ LO ACTING MODE.
In HI mode, the output activates when the display value exceeds
the setpoint level and in LO mode, the output activates when the
display value falls below the setpoint
c. PROGRAMMABLE TIME DELAY or HYSTERESIS.
Each output action can be deferred by a programmable time delay
or hysteresis level.
The time delay is the time that it takes the output to activate after
passing through the setpoint in the up or down direction, while the
hysteresis band will be selected asymmetrical i.e. only acts on the
output deactivation edge.
The delay is programmable in seconds, from 0 to 99.
The hysteresis can be programmed, in counts, within the full
display range. The decimal point appears in the same position as
programmed in the display configuration module.
The figures below show the time delay action (dly) and the
asymmetrical hysteresis action (hys) of two alarms (SET1 and
SET2) programmed to activate in HI mode (OUT1) and LO mode
(OUT2)
SET1
SET2
OUT1
OUT2
Delay Action
