Appendix d, Logic command word, Appendix – Rockwell Automation 1769-SM2 Compact I/O DSI/Modbus Communication Module User Manual
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Appendix
D
PowerFlex 4-Class Drives Logic
Command/Status Words
Appendix D provides the definitions of the Logic Command/Logic
Status words that are used for some drives that can be connected to the
1769-SM2 module. If the Logic Command/Logic Status for the drive
that you are using is not listed, refer to your drive’s documentation.
Logic Command Word
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 = Stop
x
Start
(1)
0 = Not Start
1 = Start
x
Jog
0 = Not Jog
1 = Jog
x
Clear Faults
0 = Not Clear Faults
1 = Clear Faults
x
x
Direction
00 = No Command
01 = Forward Command
10 = Reverse Command
11 = No Command
x
(2)
x
x
x
Accel Rate
(3)
00 = No Command
01 = Accel Rate 1 Command
10 = Accel Rate 2 Command
11 = Hold Accel Rate
x
x
00 = No Command
01 = Decel Rate 1 Command
10 = Decel Rate 2 Command
11 = Hold Decel Rate
x
x
x
Reference
Select
000 = No Command
001 = Freq Source (Spd Ref. par.)
010 = Freq Source (Int. Freq par.)
011 = Freq Source (Comm)
100 = Preset Freq 0
101 = Preset Freq 1
110 = Preset Freq 2
111 = Preset Freq 3
x
(1)
A “0 = Not Stop” condition (logic 0) must first be present before a “1 = Start” condition will start the drive. The Start command acts as
a momentary Start command. A “1” will start the drive, but returning to “0” will not stop the drive.
(2)
Depending on the PowerFlex 4-Class drive, the functions for bits 6, 7, and 15 change. Refer to Appendix C in the PowerFlex 4,
PowerFlex 4M, PowerFlex 40 or PowerFlex 40P drive User Manual, or Appendix E for the PowerFlex 400 drive bit functions.
(3)
The functions for these bits are the same for all PowerFlex 4-Class drives—including the PowerFlex 40P when it is used in the
“Velocity” mode. When using the PowerFlex 40P in the “Position” mode, the bit functions are different. For details, refer to Appendix C
in the PowerFlex 40P User Manual.