Cumulative Run Time Of Motor; Protection/Maintenance Function; Automatic Lowering Of Carrier Frequency; Input/Output Phase Loss Protection - FujiFilm FVR-Micro Instruction Manual

H94

Cumulative Run Time of Motor 1

Operating the keypad can display the cumulative run time of motor 1. This feature is useful for
management and maintenance of the machinery. Using H94 can modify the cumulative run
time of the motor to the desired value to be used as an arbitrary initial data. Specifying "0"
clears the cumulative run time.
H98
Protection/Maintenance Function (Mode selection)
H98 specifies whether to enable or disable (a) automatic lowering of carrier frequency, (b)
input phase loss protection, (c) output phase loss protection in a combination of Bit 0 to Bit 4.
Automatic lowering of carrier frequency (Bit 0)
This function should be used for important machinery that requires keeping the inverter
running.
Even if a heat sink overheat or overload occurs due to excessive load, abnormal ambient
temperature, or cooling system failure, enabling this function lowers the carrier frequency to
avoid tripping (OH1 or OLU). Note that enabling this function results in increased motor
noise.
Input phase loss protection (
Upon detection of an excessive stress inflicted on the apparatus connected to the main circuit
due to phase loss or line-to-line voltage unbalance in the three-phase power supplied to the
inverter, this feature stops the inverter and displays an alarm
In configurations where only a light load is driven or a DC reactor is connected,
phase loss or line-to-line voltage unbalance may not be detected because of the
relatively small stress on the apparatus connected to the main circuit.
Output phase loss protection (OPL ) (Bit 2)
Upon detection of phase loss in the output while the inverter is running, this feature stops the
inverter and displays an alarm OPL. Where a magnetic contactor is installed in the inverter
output circuit, if the magnetic contactor goes OFF during operation, all the phases will be lost.
In such a case, this protection feature does not work.
Lin
) (Bit 1)
5-67
Lin
.