4100-HCF2
Revision 3.0
P a g e 21 | 35
Figure 10 – Alarm Setup Screen View
Touch Relay 1 icon so that it is green. Enter the values of parameters described below.
Setpoint ON
This will determine the setpoint level in engineering units (% for R4 level sensor option) at which the
alarm relay activates.
Setpoint Off
This will determine the setpoint level in engineering units (% for R4 level sensor option) at which the
alarm relay will turn off. This differential feature is used to suppress chattering of alarms if the level
is hovering at the setpoint or can be used to control the differential on/off of a pump or valve.
Time Delay
Delay ON:
This is the time, in seconds, that the relay will delay before activating when the alarm
setpoint has been reached. Delay ON is used to suppress a nuisance alarm that may be caused by
a spurious or momentary alarm condition.
Delay OFF:
The time, in seconds, that the relays will stay on after the level has returned to a normal
condition. Delay OFF is used to keep controls activated after the alarm has cleared to ensure a
stable normal condition has been reached.
Alarm Above or Below Setpoint
This function is to guide the controller on how to control the failsafe and LED indications on the
screen.
Select ABOVE if the requirement is for the relay to alarm when the % rises above the setpoint.
Select BELOW if the requirement is for the relay to alarm if the % drops below a setpoint.
The parameters are now set for relay 1. Repeat the above step for rest of the other Enabled relays.
Failsafe
Failsafe will determine if the relays are energized or de-energized during a normal operating state
(no alarm condition).
If Failsafe is YES, the relay will be energized during a normal operating condition. An alarm or
power failure will de-energize the relay to the alarm state.
When in Failsafe mode and during a normal condition, the N.O. contact is closed and the N.C.
contact is open. WIRE ACCORDINGLY.