Rockwell Automation Allen-Bradley PowerFlex 4, User Manual

Page: 47 / 94

Programming and Parameters 3-11
Basic Program Group
(continued)
P038 [Speed Reference] Related Parameter(s): d012 , A069 , A070 , A071 , A072 ,
A073
Sets the source of the speed reference to the drive.
Important: When A051 or A052 [Digital Inx Sel] is set to option 2, 4, 5 or 6, and the digital input is
active, A051 or A052 will override the speed reference commanded by this parameter.
Refer to
Start and Speed Reference Control on page 1-17 for details about how other drive settings
can override the setting of this parameter.
Options 0 “Drive Potentiometer”
(Default) Internal frequency command from the potentiometer on the
integral keypad.
1 “Internal Freq” Internal frequency command from A069 [Internal Freq] .
2 “0-10V Input/Remote
Potentiometer” External frequency command from the 0-10V analog input or
remote potentiometer.
3 “4-20mA Input” External frequency command from the 4-20mA analog input.
4 “Preset Freq 0-3” External frequency command as defined by A070 - A073
[Preset Freq x] when A051 and A052 [Digital Inx Sel] are
programmed as “Preset Frequencies” and the digital inputs
are active.
5 “RS485 (DSI) Port” External frequency command from the communications port.
P039 [Accel Time 1] Related Parameter(s): P038 , P040 , A051 , A052 , A067
Sets the rate of acceleration for all speed increases.
Values Default 10.0 Secs
Min/Max: 0.0/600.0 Secs
Display: 0.1 Secs
Maximum Freq
Accel Time
Accel Rate
=
Speed
0
Time
[Maximum Freq]
[Accel Time] [Decel Time]
0
Acceleration
De
ce
lerat
ion
userman.book Page 11 Friday, June 21, 2002 2:48 PM