Selectronic SP PRO 2i Series, Instruction Manual

Page: 53 / 113

SP LINK | Configuration Settings
Doc #OI0005 Rev26 2020
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53
If the system design calls for very little, or infrequent generator input it is wise to
run the generator periodically to keep the internal parts of the motor covered with
oil and to keep the starting battery charged.
To use this feature Enable Generator Exercise and enter the Start Time the
generator will run. Max Days determines how many days between generator
starts. In this example the generator would start 30 days after the last time the
generator was called for, would start at 18:00 and would run for the period set in
Minimum Runtime.
GENERATOR REMAIN ON is feature allows you to determine the minimum load
will keep the generator running after a stop condition has been achieved, thus
avoiding significant battery discharge. This term is expressed as a percentage of
the inverter rating at 40C ambient.
In this example the inverter rating at 40C ambient is a 6 kW and
AC Load (50 -
100%) of rating is set to 80%. Therefore whilst the load on the system exceeds
4.8 kW (80% of 6kW) the generator will continue to run.
The Start output Delay setting determines the length of time after the generator
run signal is initiated by the SP PRO, either by an external request, load
requirement or by a battery charge requirement, before the generator start pulse is
initiated.
Start output Time is the length of time a start pulse is sent. This output can be
used in a pulse start/pulse stop type generator control.
Confirm start time is the time the SP PRO waits before deciding the generator
hasn’t started. The SP PRO will try a total of three times to get the generator
running with a 60 second pause between each attempt.
SIGNAL TIMING GRAPH The below graph depicts the relative timing for the Generator Run and the Generator
Start signals.
When the generator is requested to start (A), the Generator Run signal is immediately asserted. After a delay
equal to the Start Output Delay (A to B) the Generator Start signal is asserted (B) for a duration equal to the
Start Output Time
(B to C).
When the generator is requested to stop (D) the Generator Run signal is immediately de-asserted at the same
time that the Generator Start signal is asserted for a duration equal to the Start Output Time (D to E).
Generator Run
Generator Start