LSIS 6731001500, Руководство пользователя, Страница: 294 / 659

281
Learning Advanced Features
Code Description
AP1-58 Auto Op Time
Indicates time to activate Auto Change. In case that other conditions for
Auto Change are not met in spite of meeting the condition of AP1-56,
the value of time in AP1-58 might be bigger than the value set at Auto
Ch Time of AP1-56 because of the failure of Auto Change.
When AP1-55 (Auto Ch Mode) is set to ‘ 0 (None),’ the auxiliary motors operates based on the order
(sequence) set at AP1-43 (Starting Aux). Auto Change functionality is disabled.
When
AP1-55 (Auto Ch Mode) is set to ‘1
(Aux Exchange)’, the auxiliary motors operate based on the
order (sequence) set at AP1-43 (Starting Aux). Auto Change is activated when auxiliary motors
are in the operating state over time of AP1-56 and then every auxiliary motor is stopped.
Once the auto change is operated, the auxiliary motor that started first is given the lowest priority
and all the other auxiliary motors’ priority level increases by 1. Then, general MMC operation
continues.
NOTE
Auto change does not work while the auxiliary motors are operating. Auto change is operated only
when all the auxiliary motors are stopped and if all the conditions set for the auto change are met.
When the inverter stops, all motors stop operating, and the auxiliary motor with the highest priority
becomes the starting auxiliary motor. If the inverter power is turned off then turned back on, the
auxiliary motor set at AP1-43 (Starting Aux) becomes the starting auxiliary motor.
Start order and stop order of the auxiliary motors are based on the order set at AP1-49 (FIFO/FILO).
The following diagrams depict the auxiliary motor start and stop sequence, based on a FIFO
configuration, when the inverter operation time exceeds the auto change interval set at AP1-58. If all
the auxiliary motors are turned off and the inverter operation frequency is below the frequency set at
AP1-58 (Auto Op Time), auto change is operated. Then, when the inverter frequency increases due to
decrease in the feedback, auxiliary motor #2 starts instead of auxiliary motor #1 due to this auto
change (auxiliary motor #1 starts last, for it has the lowest priority).
Later on during the operation, when the feedback increases and the auxiliary motors begin to stop,
the FILO setting is applied to control the order for the auxiliary motors to stop.