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Repetition
Select the time cycle to repeat the event: Hourly, Daily, 1 Week, 2 Week, 4
Week, or None.
An event means that the output is turned on at the same time of day, for the same
amount of time, and except for the Daily cycle, on the same day of the week.
Week
Only appears if Repetition is longer than 1 Week. Select the week during
which the event will occur.
Day
Only appears if Repetition is longer than Daily. Select the day of the week
during which the event will occur.
Events Per Day
Only appears if Repetition is Hourly. Select the number of events per day. The
events occur on the Start Time and then evenly spaced throughout the day.
Start Time
Enter the time of day to start the event.
Duration
Enter the amount of time that the relay will be on.
Add Last Missed
Select Enabled if the controller should delay start the most recent timer
cycle until immediately after an Interlock clears, or Disabled if all events
should be skipped if there is an Interlock condition at the time the add was
due to start.
5.3.13
Relay, Probe Wash Control Mode
Basic Timer Operation
When a Probe Wash event triggers, the algorithm will activate the relay for the programmed time. The relay will
activate a pump or valve to supply a cleaning solution to the sensor or sensors. The output of the selected sensors
will either be held or disabled during the cleaning cycle, and for a programmable hold time after the cleaning cycle.
Special Condition Handling
Overlapping timer events
If a second timer event occurs while the first one is still active, the second event will be ignored. An Event Skipped
alarm will be set.
5.3.14
Relay, Spike Control Mode
Basic Timer Operation
This algorithm is typically used to provide a baseline amount of chlorine for disinfection, and periodically shocking
the system with a larger dose. During normal operation, the relay will be reacting to sensor to maintain a set point
within a programmable Deadband, as described in On/Off Control Mode above. When a Spike event triggers, the
algorithm will change from the normal set point to the Spike Set Point, and once it reaches that set point, maintains it
for the programmed time. Once the time expires, control to the normal set point resumes.
Special Condition Handling
Overlapping timer events
If a second timer event occurs while the first one is still active, the second event will be ignored. An Event Skipped
alarm will be set.
Interlock Conditions
Interlocks override the relay control, but do not change the operation of the timer control.
A digital input or output interlock condition does not delay the relay activation. The relay activation duration timer
will continue even if the relay is deactivated due to an interlock condition. This will prevent delayed events which
can potentially cause problems in they do not occur at the correct time.
“Activate With” Conditions
“Activate with channels” settings override the relay control, but do not change the operation of the timer control.
The relay activation duration timer continues counting when the timer relay is forced on, and ends at the expected
time (event start time plus duration). If the “activate with” condition continues after the end of the event time, the
relay remains activated.
