Rockwell-automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapt Manual de usuario descargar pdf (Pagina 100)

100 Rockwell Automation Publication 750COM-UM001E-EN-P - October 2013

Chapter 6 Using Explicit Messaging

ControlLogix Controller Example Scattered Read Request Data

In this message example, we use the data structure in Figure 26 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 148 (Class code 0x93) or Host DPI

Parameter Object on page 162 (Class code 0x9F) for parameter numbering.

Figure 26 - 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 27

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 a 32-bit integers, do

not COP the data to a REAL tag.

Figure 27 - 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

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 189 190

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Rockwell-automation 20G PowerFlex 755 Drive Embedded EtherNet/IP Adapt Manual de usuario Pagina 100