Rockwell Automation 20-750-ENETR PowerFlexDual-Port EtherNet/IP Option Module User Manual

Page 107

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Rockwell Automation Publication 750COM-UM008A-EN-P - July 2012

107

Using Explicit Messaging (Adapter mode only)

Chapter 6

ControlLogix Controller Example Scattered Read Request Data

In this message example, we use the data structure in

Figure 30

in the source tag

named Scattered Read Request to read these five 32-bit REAL (floating point)
parameters in a PowerFlex 750-Series drive:

Parameter 001 - [Output Frequency]

Parameter 007 - [Output Current]

Parameter 008 - [Output Voltage]

Parameter 009 - [Output Power]

Parameter 011 - [DC Bus Volts]

See

DPI Parameter Object on page 163

(Class code 0x93) or

Host DPI

Parameter Object on page 177

(Class code 0x9F) for parameter numbering.

Figure 30 - Example Scattered Read Request Data

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 31

shows

the parameter values which, in this example, have been converted using a UDDT
for correct presentation. COP (Copy) instructions could have been used for this
purpose instead of a UDDT. If the parameters being read are 32-bit integers, do
not COP the data to a REAL tag.

Figure 31 - Example Scattered Read Response Converted Data

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

PowerFlex 750-Series Drive Parameter

Read Value

1 - [Output Frequency]

60.205975 Hz

7 - [Output Current]

12.570678 Amp

8 - [Output Voltage]

418.34348V AC

9 - [Output Power]

12.3534 kW

11 - [DC Bus Volts]

566.5277V DC

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