setpoints at the same time. Either relay output is operated using OR scheme for all
setpoints. The relay will be operated when there is at least one setpoint activating the
relay output, and will be released when this is not the case.
4.17.6 Special Considerations
Power Loss
In the event of loss of power, all relay outputs will be released. After power up, all
setpoints will revert to the idle state, and all setpoint conditions will be re-evaluated
with a 2-second delay, considering the present conditions at the time that the power
is restored.
Programmable event flags will be saved. If any setpoint has been forced operated or
released using event flags, it will automatically return to its state prior to loss of
power.
Interval timers are restarted when the power is restored, so the time base for timers
operation will be different from that was prior to loss of power.
Programming Mode
When the user enters programming mode at the protected level, allowing the setup to
be changed, setpoint monitoring is temporarily suspended. Entering setup at the view
mode does not affect the setpoint operation.
Note that while in the protected level, all interval timers are also suspended to
prevent faulty setpoint operation when the user changes setup.
Re-allocating Relay Output
When the user re-allocates relay output being controlled by the setpoint to output
pulses, the setpoint is automatically disabled.
Changing Basic Setup
When the user changes a basic setup parameter that affects the setpoint trigger
calculation method or range, the setpoint is automatically disabled. Those are
WIRING MODE (affects all voltage, current and power based triggers), PT RATIO
(affects all voltage and power based triggers), and CT PRIMARY CURRENT
(affects all current and power based triggers). Enter WIRING MODE, PT RATIO
and CT PRIMARY CURRENT the first time!
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