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Rockwell Automation Publication 20Y-UM001F-EN-P - April 2017
Appendix A
Supplemental Information
DPI Communication
Configurations
This section contains information for how to use DPI™ communication with
the PowerFlex Active Front End.
Typical Programmable Controller Configurations
Logic Command Word for PowerFlex 700/700H/700S Drives
IMPORTANT
If programs are written that continuously write information to the AFE
control, be sure to format the block transfer correctly. If attribute 10 is
selected for the block transfer, values are written only to RAM and are not
saved by the drive. Attribute 10 is the preferred attribute for continuous
transfers.
If attribute 9 is selected, each program scan completes a write to the drives
nonvolatile memory (EEPROM). Because the EEPROM accommodates only a
fixed number of writes, excessive continuous block transfers can quickly
damage the EEPROM. Therefore, do
not
assign attribute 9 to continuous
block transfers. See the individual communication adapter user manual for
details.
Logic Bits
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Command
Description
x
Stop
0 = Not Stop
1 = Normal Stop
x
Start
(1)
0 = Not Start
1 = Start
x
Reserved
x
Clear Fault
(2)
0 = Not Clear Fault
1 = Clear Fault
x
Reserved
x
Reserved
x
Reserved
x
Cmd LogicOut
0 = Network-controlled
Digital Output off
1 = Network-controlled
Digital Output on
x
Reserved
x
Reserved
x
Reserved
x
Reserved
x
Reserved
x
Reserved
x
Reserved
x
Reserved
(1) A Not Stop condition (logic bit 0 = 0, logic bit 8 = 0, and logic bit 9 = 0) must first be present before a 1 = Start condition starts the AFE.
(2) To perform this command, the value must switch from ‘0’ to ‘1’.
Summary of Contents for Allen-Bradley PowerFlex 700AFE
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