4–53

SJ200 Inverter

Analog Output Operation

In inverter applications it is useful to monitor the inverter operation from a remote location or from the front panel of an inverter enclosure. In some cases, this requires only a panel-mounted volt meter. In other cases, a controller such as a PLC may provide the inverter’s frequency command, and require inverter feedback data (such as output frequency or output current) to confirm actual operation. The analog output terminal [AM] serves these purposes.

H O OI L AM CM2 12 11

 

 

 

 

–

 

 

+

 

Analog

 

 

A GND

 

 

 

 

 

 

 

Voltage Output

 

 

 

 

 

 

 

10VDC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

full scale,

 

 

 

 

 

 

 

 

 

1mA max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See I/O specs on page 4–6.

The inverter provides an analog voltage output on terminal [AM] with terminal [L] as analog GND reference. The [AM] can output inverter frequency or current output value. Note that the voltage range is 0 to +10V (positive-going only), regardless of forward or reverse motor rotation. Use C028 to configure terminal [FM] as indicated below.

Func.

Code

Description

Range

 

 

 

 

 

 

 

 

C028

00

Output frequency

0 – Max. frequency (Hz)

 

 

 

01

Output current

0 – 200%

 

 

 

 

 

The [AM] signal offset and gain are adjustable, as indicated below.

Func.

Description

Range

Default

 

 

 

 

 

 

 

 

B080

[AM] analog signal gain

0 to 255

100

 

 

 

 

C086

[AM] terminal offset tuning

0 – 10V

0.0

 

 

 

 

The graph to the right shows the effect of the gain setting. To calibrate the [AM] output for your application, follow the steps below:

1.Verify that the inverter is in Stop Mode.

2.Use C086 to adjust the offset voltage. The factory default (0V) is the correct value for most cases. Otherwise, you can have a positive voltage at zero speed or current.

3.Run the motor at the full scale speed.

a.If [AM] represents output frequency, use B080 to set the voltage for full scale output (up to 10V).

[AM]

B080=200% 10V

B080=100%

5V B080=50%

0

1/2 full

Full

Hz

scale

scale

or

 

output

A

Operations Monitoring and

b.If [AM] represents motor current, use B080 to set the voltage for full scale output. Remember to leave room at the upper end of the range for increased current when the motor is under heavier loads.