ControlLogix Controller Example Scattered Read Request Data
In this message example, the source tag Scattered Read Request, is used to read
the five floating point parameters (32-bit REAL) in the PowerFlex 755T drive.
See
DPI Parameter Object on page 145
Parameter Object on page 163
See the data structure in
• 10:001 - [Output Frequency]
• 10:003 - [Output Current]
• 10:002 - [Output Voltage]
• 10:004 - [Output Power]
• 0:003- [DC Bus Volts]
Figure 25 - Example Scattered Read Request Data
ControlLogix Controller Example Scattered Read Response Data
The Scattered Read Request message reads multiple parameters and returns
their values to the destination tag (Scattered_Read_Response).
the parameter values which, in this example, have been converted using a
UDDT for correct presentation. For parameters that are 32-bit integers, do not
COP (copy) the data to a REAL tag. COP (copy) could have been used instead
of a UDDT for parameter less than 32-bits. Example Scattered Read Response
Converted Data
In this message example, the parameters have the following values, the values
are written as Port Number: Parameter Number - [Parameter Name]
PowerFlex 755T Drive Parameter
10:1 - [Output Frequency]
10:3 - [Output Current]
10:2 - [Output Voltage]
10:4 - [Output Power]
0:3 - [DC Bus Volts]
Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017
(Class code 0x93) or
(Class code 0x9F) for parameter numbering.
Figure
25.
Read Value
60.205975 Hz
12.570678 A
418.34348V AC
12.3534 kW
566.5277V DC
Using Explicit Messaging
Chapter 5
Host DPI
Figure
shows
105