Omron SYSDRIVE MX2 SERIES User Manual

5-108
5-8 Restart Functions
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
5
Functions
Controlled Deceleration on Power Loss DC Voltage Constant Control (b050 = 02: Without Recovery, b050 = 03: With Recovery)
If a momentary power interruption or main circuit DC voltage drop occurs during operation, the
Inverter decelerates while keeping the main circuit DC voltage at the value set in
Deceleration
Hold Level of Ctrl. Decel (b052).
This function will be started when the following conditions are all satisfied:
 b050 = 02 or 03
 The Inverter is operating. (This function is disabled during trip/undervoltage/stop.)
 The control power supply is momentarily interrupted, or the main circuit DC voltage falls below the
setting of DC Bus Voltage Trigger Level of Ctrl. Decel b051.
If the time of momentary power interruption is short, the Inverter can continue to run without
shutting off the output. However, if undervoltage occurs because of momentary power
interruption, the Inverter immediately shuts off the output, and stops operating this function.
The subsequent power recovery depends on the Retry Selection b001.
With b050 = 03, the Inverter can be restored to normal operation, if a momentary power
interruption occurs and incoming voltage recovers before the output is shut off. Note that the
Inverter may decelerate to a stop, depending on the b051 setting. Below are the details.
If operation of this function results in deceleration stop, the Inverter is forced to stop, even if the FW (forward) command is
ON. To restart the Inverter, make sure that the incoming voltage has recovered, and input the FW (forward) command again.
Example 1)
The main circuit DC voltage level, while this function is activated, may fall below the b052 set
value depending on the proportional gain and integral time settings.
b050 b051 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)
Main circuit PN-PN voltage
Vpn (V)
Output frequency
(Hz)
b052
Time
Time
b051
Main circuit DC voltage
at incoming voltage recovery
DC voltage kept constant
b050 = 02, 03 (deceleration stop)
Incoming voltage recovery

Omron SYSDRIVE MX2 SERIES Specifications

General

Brand	Omron
Model	SYSDRIVE MX2 SERIES
Category	Inverter
Language	English