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Filtering, Scale block analog output, Network controlled analog output – Rockwell Automation 20A PowerFlex 70EC/700VC User Manual

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12

Analog Outputs

Filtering

Software filtering is performed on quantities that can be monitored as described in
the following table. The purpose of this filtering is to provide a signal and display
that is less sensitive to noise and ripple.

Software Filters

Scale Block Analog Output

In addition to the common selections, an analog output can be driven by any
available data. The data can then be scaled before it reaches the output. A “Link”
function establishes a connection from the data to the input of a “Scale Block.”

The analog output selection “Scale Block x” makes the connection from the output
of the scale block to the physical output.

Example

Analog Output 2 set for 0-10V DC for Heat Sink Temp 0-100 Degrees C. using Scale Block 1. Setup:

− Link [Scale1 In Value], parameter 476 to [Testpoint 1 Data], param. 235
− [Testpoint 1 Sel], parameter 234 = 2 “Heat Sink Temp”
− [Analog Out2 Sel], parameter 345 = 20 “Scale Block 1”
− [Analog Out2 Hi], parameter 346 = 10.000 Volts
− [Analog Out2 Lo], parameter 347 = 0.000 Volts
− [Scale1 In Hi], parameter 477 = 100
− [Scale1 In Lo], parameter 478 = 0

Network Controlled Analog Output

Enables the analog outputs to be controlled by network Datalinks to the drive.

Example

Analog Output 1 controlled by DataLink C1. Output 0-10V DC with DataLink values of 0-10000. Setup:
− [Data In C1], parameter = 304 “Analog Output 1 Setpoint”
− [Analog Out1 Sel], parameter 342 = 24 “Parameter Control”
− [Analog Out1 Hi], parameter 343 = 10.000 Volts
− [Analog Out1 Lo], parameter 344= 0.000 Volts

The device that writes to DataLink C1 now controls the voltage output of Analog Out1. For example:
2500 = 2.5V DC, 5000 = 5.0V DC, 7500 = 7.5V DC.

Quantity

Filter

Output Frequency

No Filtering

Commanded Frequency

Filtered

Output Current

Filtered

Output Torque Current

Filtered

Output Flux Current

Filtered

Output Power

Filtered

Output Voltage

Filtered

DC Bus Voltage

Filtered

PI Reference

No Filtering

PI Feedback

No Filtering

PI Error

No Filtering

PI Output

No Filtering

700VC

ONLY

477

In Lo

In Hi

In Hi

Out Lo

Out

Out Hi

235

Testpoint 1 Data

476

478

479

481

480

Scale 1

Link

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