Rockwell Automation 20-750-CNETC PowerFlex Coaxial ControlNet Option Module User Manual
Page 85
Rockwell Automation Publication 750COM-UM003B-EN-P - November 2012
85
Using Explicit Messaging
Chapter 6
ControlLogix Controller Example Scattered Write Request Data
In this message example, we use the data structure in
Figure 29
in the source tag
(Scattered_Write_Request) to write new values to these 32-bit REAL (floating
point) parameters:
DPI Parameter Object on page 115
(Class code 0x93) or
(Class code 0x9F) for parameter numbering.
Figure 29
shows the parameter values which, in this example, have been
converted using a UDDT to correctly write their values. COP (Copy)
instructions could have been used for this purpose instead of a UDDT. If the
parameters being written to are 32-bit integers, do not COP the data to a REAL
tag.
Figure 29 - Example Scattered Write Request Converted Data
ControlLogix Controller Example Scattered Write Response Data
The results of the message appear in the destination tag named
Scattered_Write_Response (
Figure 30
). Values of ‘0’ indicate no errors occurred.
Figure 30 - Example Scattered Write Response Data
PowerFlex 750-Series Drive Parameter
Write Value
536 - [Accel Time 2]
11.1 Sec
538 - [Decel Time 2]
22.2 Sec
575 - [Preset Speed 5]
33.3 Hz
576 - [Preset Speed 6]
44.4 Hz
577 - [Preset Speed 7]
55.5 Hz