EVCO c-pro nano RACK - Manual (Page 53)

C-PRO NANO RACK E C-PRO MICRO RACK APPLICATION MANUAL
Page 53
an alarm or that are in manual function mode and it is able to dynamically turn on other compressors if one or
more are subject to a state of alarm.
Through the PC01 parameter, the program is able to manage 4 types of rotation: FIFO, LIFO, FIFO + hours,
LIFO + hours.
1) FIFO
Follows the logic “First In First Out”, or in other words, the first compressor that turns on will then be the first
that must shut off. This logic could initially lead to a large difference in the hours of operation among the
various compressors, but after an initial phase, the hours should approximately be equal.
Example.
Turn-on : C1 . C2 . C3 . C4
Shutdown: C1 . C2 . C3 . C4
This type of rotation has a particular feature in the case where all the compressors configured in the system do
not turn on; in fact, if, for example, the first compressor turns on and then shuts off, the next compressor to turn
on will be the second. The last compressor that shut off is memorized and the next one in sequence is turned on
so that the same compressor is not always used and thus all the configured parts are taken advantage of in the
best possible way.
Example with 4 compressors
Turn-on : C1 . C2 . Shutdown: C1 . C2 .
Turn-on : C3. C4. Shutdown: C3. C4.
Turn-on : C1 . C2 . C3. C4. Shutdown: C1 . C2 . C3. C4.
2) LIFO
Follows the logic “Last In First Out”, or in other words, the last compressor turned on will be the first to be
turned off.
Example.
Turn-on : C1 . C2 . C3 . C4
Shutdown: C4 . C3 . C2 . C1
The turn-on order will always begin with the C1 compressor.
3) FIFO + hours of operation
This rotation promotes the comparison of the hours of operation of the various compressors. During turn-on, the
compressor with the least number of hours of operation will be favored, while during shutdown, the compressor
with the greatest number of hours will be favored.
In the case where a choice must be made among compressors that have the same number of hours, a FIFO
rotation takes effect, in such a way as to in any case guarantee a rotation, even when there are the same number
of hours of operation.
Example. 1
Turn-on : C1(3 hours) . C2(3 hours) . C3(3 hours) . C4(3 hours)
Shutdown: C1(3 hours) . C2(3 hours) . C3(3 hours) . C4(3 hours)
Example. 2
Turn-on : C1(1 hour) . C2(3 hours) . C3(3 hours) . C4(5 hours)
Shutdown: C4(5 hours) . C2(3 hours) . C3(3 hours) . C1(1 hour)
4) LIFO + hours of operation
This rotation promotes the comparison of the hours of operation of the various compressors. During turn-on, the
compressor with the least number of hours of operation will be favored, while during shutdown, the compressor
with the greatest number of hours will be favored.
In the case where a choice must be made among compressors that have the same number of hours, a LIFO
rotation takes effect.