E6582062
6. [Advanced] How to use parameters 6-58
4
4
6
9
• When a Fwd/Rev switching or stop command is input during synchronized deceleration,
synchronized acceleration/deceleration stops.
• To operate a motor again after a synchronized deceleration function stop, turn OFF the terminal
[S1].
• When using the synchronized deceleration function, check that the overvoltage stall prevention
function is not working during deceleration.
■ Setting example of <F302: Regenerative power ride-through> = "4"
When <F114: Terminal S1 function 1> is set to "62: Synchronized Acc/Dec", and a power failure
synchronized signal is allocated to the terminal [S1].
Synchronized deceleration is performed when the terminal [S1] is ON or power failure occurs, and
synchronized acceleration is performed when the terminal [S1] is OFF or restoration of power
occurs.
• When <F302> is set to "1", "2" or "4", the voltage in power circuit inside the inverter is controlled
between <F625: Undervoltage detection level> and <F629: Regenerative power ride-through
level>.
• When the voltage falls to <F625: Undervoltage detection level> or less, the power circuit
undervoltage (MOFF) alarm is displayed and the motor enters the coasting state. If "MOFF" is
displayed immediately after a power failure, adjust by decreasing the <F625> setting or slightly
increasing the <F629: Regenerative power ride-through level> setting.
Reference
• How to operate the operation panel -> Refer to [3. 1. 1].
• How to switch display mode on the operation panel -> Refer to [3. 1. 2].
• Procedure to change parameter setting -> Refer to [4. 2. 3]
• Details on operation by external signals -> Refer to [Chapter 7].
Input power
Motor speed
Inverter 1
Inverter 2
Power failure
synchronized signal
(Terminal [S1])
ON
ON
OFF
Time
<F317>
<F318>
<F317>
<F318>
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