4–5

SJ300 Inverter

Follow the steps to implement the wiring change shown in the previous diagram.

1.Remove the 2-wire jumper J51 (terminals [R0] and [T0] to connector J51).

2.Procure several inches of multi-strand 20 AWG (0.5mm2) or slightly heavier wire.

3.Connect a wire to terminal [R0] that is long enough to connect to terminal [P] (do not connect to [P] yet).

4.Connect a wire to terminal [T0] that is long enough to connect to terminal [N] (do not connect to [N] yet).

5.Remove the ferrite filter from the original jumper wire and then slide it onto the new wires connecting to terminals [R0] and [T0]. (Be sure to save the original jumper in a safe place.)

6.Connect the wire from [R0] to [P], and connect the wire from [T0] to [N] as shown.

More information on power loss related alarm functions, see “Instantaneous Power Failure / Under-voltage Signal” on page 4–51.

The following table lists the functions related to the controlled deceleration at power loss feature. After making the wiring change, use function B050 to enable the feature. Use B051 to determine the point at which a decaying DC bus voltage will trigger the controlled deceleration. Use parameter B054 to specify an initial step-wise deceleration at power loss, and B053 to specify the duration of the linear deceleration. Note that this feature also affects the output signals that indicate instantaneous power fail and under-voltage conditions (see “Instantaneous Power Failure / Under-voltage Signal” on page 4–51).

Func.

Name

Description

Range

 

 

Code

 

 

 

 

 

 

 

 

 

 

 

 

 

B050

Controlled deceleration and

Allows inverter control using regen-

Two option codes:

 

 

 

stop on power loss

erative energy to decelerate after loss

00Disable

 

Operations Monitoringand

 

 

of input power (requires jumper

01Enable

 

 

 

change)

 

 

 

 

 

 

 

 

 

 

 

 

 

B051

DC bus voltage trigger level

Sets trigger for controlled decelera-

0.0 to 1000.V

 

 

 

during power loss

tion and stop on power loss function

 

 

 

 

 

 

 

 

 

B052

Over-voltage threshold during

Sets over-voltage threshold for

0.0 to 1000.V

 

 

 

power loss

controlled deceleration function

 

 

 

 

 

 

 

 

 

B053

Deceleration time setting

Deceleration time inverter uses only

0.01 to 99.99 sec. /

 

 

 

during power loss

at power loss

100.0 to 999.9 sec. /

 

 

 

 

 

1000 to 3600 sec.

 

 

 

 

 

 

 

 

B054

Initial output frequency

Sets the initial decrease in output

0.00 to 10.00 Hz

 

 

 

decrease during power loss

frequency upon power loss