Rockwell Automation Publication 750-RM004A-EN-P - April 2018 117
Communication Configuration Chapter 3
Logic Command Word
Comparison
Table 68 shows the motor side inverter communication Logic Command
Word comparison that applies to the Logix Add-On-Profile (AOP). The Logic
Command Word functions are pre-defined by the AOP and associated tags are
automatically assigned in the Logix project.
• “Start” is a momentary command, that is, a transition from ‘0’ to ‘1’
performs the start function. A ‘1’ to ‘0’ transition of the “Start”
command has no effect on operation and does NOT perform a stop
function.
• The “Run” command is a maintained function. A ‘0’ to ‘1’ transition of
the “Run” command performs the run function. A ‘1’ to ‘0’ transition of
the “Run” command performs a stop function.
• The “NormalStop” or “Stop” command must transition from ‘0’ to ‘1’ to
perform a stop function. The “Start” and “Run” commands are inhibited
if the “NormalStop” or “Stop” command is ‘1’. The “Start” or “Run”
commands must transition from ‘0’ to ‘1’ after a stop command in order
to perform the start or run functions.
• PowerFlex 755TL/TR drives and PowerFlex 755TM common bus
inverters do not have a line side converter Logic Command Word. To
manually control the PowerFlex 755TL/TR line side converter, you
must set 0:63 [LS Start Mode] = (0) 'Conv Logic'. To control the line
side converter via communication link from the Logix controller, assign
parameter 0:64 [LS Manual Ctrl] to an Output DataLink.
Alternatively, the line side converter can be controlled manually by
Digital I/O parameters; 0:105 [DI L Enable], 0:112 [DI L Stop], 0:119
[DI L Start] and 0:123 [DI L Run].
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