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Run Time Alarm
If the selected relay output is controlling a device that needs periodic maintenance, you
can enter a Run Time Alarm Delay period that, once exceeded, generates an alarm
condition that will notify the user when it occurs. If you need to protect the equipment
you can select the Disable Relay box and the relay will de-activate once this run time has
been exceeded.
Relay Output Type
Some control methods require the relay contacts to be closed when the output is
activated, others require the contacts to be open. You can select which method of control
to use with this option.
Global Binary Channel
If this output was configured to follow a global binary broadcast, enter which channel (1
- 16) the relay should follow. The output will be active when the binary value is “1” and
will de-activate when the value is “0”.
Lead/Lag Control
If you have configured this relay as the Lead relay in a Lead/Lag control scheme then
you will also need to set the Changeover Interval and the Proof Failure Timeout Delay
shown on the right hand side of the relay configuration screen.
The Changeover Delay is used to toggle the Lag output into the Lead once the runtime
hours of the Lead output exceed this amount of time on the Lag output.
The Proof Failure Time Delay is the amount of time given for the “Proof of Flow” input
to become active once the Lead or Lag output is energized. If this proof is not made
within the specified amount of time, the controller switches to the Lag output in an
attempt to get the controller running and then sets an alarm to flag the user that
something is wrong.
Hi/Lo Limit Setpoints
All On/Off control methods require setpoints to be entered for control purposes. The
relay state changes based on the control method selected and the current reading versus
the Hi Limit Setpoint or Lo Limit Setpoint. If you have selected the On Above and
Off Below method, then the relay would be active when the reading exceeds the Hi Limit
Setpoint and it would not be active below the Lo Limit Setpoint. In either case, the user
defined Deadband would also need to be satisfied before the actual relay change of state
occurs.