Programming and Parameters 3-11
Basic Program Group (continued)
P038 [Speed Reference] Related Parameter(s): d001, d002, d012, P039, P040, A051, A052,
A069
, A070-A073, A110, A111, A112, A113
Sets the source of the speed reference to the drive.
The drive speed command can be obtained from a number of different sources. The source is
normally determined by P038
[Speed Reference]. However, when A051 - A052 [Digital Inx Sel] is set
to option 2, 4, 5, 6, 11, 12, 13, 14, 15 and the digital input is active, the speed reference commanded
by P038
[Speed Reference] will be overridden. Refer to the flowchart on page 1-18 for more
information on speed reference control priority.
Options 0 “Drive Pot” (Default) Internal frequency command from the potentiometer on the
integral keypad.
1 “InternalFreq” Internal frequency command from A069
[Internal Freq].
2 “0-10V Input” 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” 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 “Comm Port” External frequency command from the communications port.
P039 [Accel Time 1] Related Parameter(s): P038, P040, A051, A052, A067, A070-A073
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
P035 [Maximum Freq]
P039 or A067
[Accel Time x]
P040 or A068
[Decel Time x]
0
Acceleration
D
eceleration
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