7 Detailed Functions
7 - 90
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
• If a power supply shutoff or undervoltage is detected during operation, the function causes the
inverter to stop after deceleration so that the internal DC power of the inverter does not exceed the
Deceleration Hold Level on Power Interruption (b052).
• To use this function, remove the J51 connector cable connected between the terminals Ro and To
and connect the main circuit terminals P and N to Ro and To via cables, respectively. The cable size
should be 0.75 mm
2
or larger.
• If, after a power supply shutoff or undervoltage is detected during operation, the internal DC power of
the inverter falls to or below the Starting Voltage on Power Interruption (b051), the inverter will start
decelerating the motor so that the internal DC power of the inverter does not exceed the Deceleration
Hold Level on Power Interruption (b052) under PI control.
• In case of a short momentary power interruption, the inverter can operate continuously without
shutting off its output.
However, if an undervoltage occurs during deceleration after an momentary power interruption, the
inverter will shut off its output immediately to terminate this function. The subsequent operation when
the power is restored after a momentary power interruption depends on the Power
Interruption/Undervoltage Restart Selection (b001) setting.
• If, after this function is activated, the power is recovered before another momentary power
interruption is detected, the inverter can return to normal operation. In this case, the subsequent
operation varies depending on the Deceleration Stop Selection on Power Interruption (b050) and
Deceleration Hold Level on Power Interruption (b052) settings.
Deceleration Stop on Power Interruption: b050 = 02 (Without
Recovery), b050 = 03 (With Recovery)
b050 b052 Operation
02: (without recovery)
b052 > Main circuit DC voltage at incoming
voltage recovery
Deceleration stop (DC voltage constant
control) (Example 1)
b052 < Main circuit DC voltage at incoming
voltage recovery
Deceleration stop (Normal operation)
(Example 2)
03: (with recovery)
b052 > Main circuit DC voltage at incoming
voltage recovery
Deceleration stop (DC voltage constant
control) (Example 1)
b052 < Main circuit DC voltage at incoming
voltage recovery
Operation (Normal operation) (Example 2)
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