PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
Supplemental Drive Information A-5
Communication
Configurations
Typical Programmable Controller Configurations
Logic Command/Status Words
Refer to parameter 1328 [Drive Logic Rslt] for more information.
Figure A.1 Logic Command Word
Important: If block transfers are programmed to continuously write information to the drive, care must
be taken to properly format the block transfer. If attribute 10 is selected for the block
transfer, values will be written only to RAM and will not be saved by the drive. This is the
preferred attribute for continuous transfers. If attribute 9 is selected, each program scan
will complete a write to the drives non-volatile memory (EEprom). Since the EEprom has
a fixed number of allowed writes, continuous block transfers will quickly damage the
EEprom. Do Not assign attribute 9 to continuous block transfers. Refer to the individual
communications adapter User Manual for additional details.
Logic Bits
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Command Description
xStop
(1)
0 = Not Stop
1 = Stop
xStart
(1)(2)
(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)
This Start will not function if a digital input (parameters 131- 144) is programmed for 2-Wire Control (option 5
“Run”, 6 “Run Forward” or 7 “Run Reverse”).
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 = Hold Present Direction
x Local
Control
0 = No Local Control
1 = Local Control
xMOP
Increment
0 = Not Increment
1 = Increment
x x Accel Rate 00 = No Command
01 = Use Accel Time 1
10 = Use Accel Time 2
11 = Use Present Time
xx Decel
Rate
00 = No Command
01 = Use Decel Time 1
10 = Use Decel Time 2
11 = Use Present Time
x x x Reference
Select
(3)
(3)
This Reference Select will not function if a digital input (parameters 131- 144) is programmed for “Speed Sel 1,
2 or 3” (option 17, 18 or 19). Note that Reference Selection is “Exclusive Ownership” see [Reference Owner] on
page 3-59.
000 = No Command
001 = Ref. 1 (Spd Ref A)
010 = Ref. 2 (Spd Ref B)
011 = Ref. 3 (Preset Spd 3)
100 = Ref. 4 (Preset Spd 4)
101 = Ref. 5 (Preset Spd 5)
110 = Ref. 6 (Preset Spd 6)
111 = Ref. 7 (Preset Spd 7)
xMOP
Decrement
0 = Not Decrement
1 = Decrement
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