Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual

Page 144

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6-16

Using Explicit Messaging

20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P

ControlLogix Controller Example Scattered Read Response Data

The Scattered Read Request message reads the multiple parameters and
returns their values to the destination tag (Scattered_Read_Response).

Figure 6.16

or

Figure 6.17

shows the parameter values.

Figure 6.16 Example Scattered Read Response Data for PowerFlex 7-Class Drive

In this message example, the parameters have the following values.

Figure 6.17 Example Scattered Read Response Data for PowerFlex 750-Series Drive

The PowerFlex 750-Series drive uses 32-bit integer and REAL parameters.
A COP command must be used to copy the Scattered_Read_Response
integer array to a 32-bit integer or REAL tag.

Figure 6.18

shows the ladder

logic used for this example. If the parameter data type is a REAL, then the
destination tag is a REAL. If the parameter data type is a 32-bit integer, then
the destination tag is a DINT. See the drive documentation to determine the
parameter data type (32-bit integer or REAL).

PowerFlex 7-Class Drive Parameter

Read Value

1 - [Output Freq]

32.5 Hz

3 - [Output Current]

0.01 Amp

6 - [Output Voltage]

118.7V AC

12 - [DC Bus Voltage]

329.2V DC

17 - [Analog In2 Value]

8.318 mA

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