Rockwell Automation 20-750-ENETR PowerFlexDual-Port EtherNet/IP Option Module User Manual
Page 107
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
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]
DPI Parameter Object on page 163
(Class code 0x93) or
(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).
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