Rockwell Automation Publication 22C-UM001J-EN-E - January 2017 37
Installation/Wiring Chapter 1
Start and Speed Reference
Control
The drive speed command can be obtained from a number of different sources.
The source is normally determined by P038
[Speed Reference]. The drive Start
command is normally determined by P036
[Start Source]. However, the
settings for these parameters can be overridden by a variety of methods. See the
chart below for the override priority.
Purge Input
Enabled and Active:
[Digital Inx Sel] = 1
Local Input
Enabled and Active
[Digital Inx Sel] = 3
No
Ye s
Start, Speed and Direction commands
come from Integral Keypad.
Direction is Forward unless an input is
programmed for "Keypad/Jog Direction"
Auto Input
Enabled and Active
[Digital Inx Sel] = 2
No
Ye s
Run as specified by
P038 [Speed Reference].
Start and Direction commands
come from P036 [Start Source].
Comm Select Input
Enabled and Active:
[Digital Inx Sel] = 4
No
Ye s
Start, Speed and Direction commands
come from RS485 (DSI) port.
Drive is in
Hand/Local Mode
selected by AUTO key
(1)
No
Ye s
Start and Speed commands
come from Integral Keypad.
Direction is Forward unless an input is
programmed for "Cmd Reverse"
Analog Input 1
Override Enabled & Active:
[Digital Inx Sel] = 14
Analog Input 2
Override Enabled & Active:
[Digital Inx Sel] = 15
No
Ye s
Speed commands come from
Analog Input 1 (I/O Terminal 13).
Start and Direction
follows P036 [Start Source].
Speed commands come from
Analog Input 2 (I/O Terminal 17).
Start and Direction
follows P036 [Start Source].
No
Ye s
P038 [Speed Reference]
= 4 or 5
No
Ye s
Run as specified by
P038 [Speed Reference].
Start and Direction commands come
from P036 [Start Source].
Run as specified by
A144-A146 [Preset Freq 1-3].
Start follows P036 [Start Source],
Direction follows
Preset Frequency settings.
Preset Inputs Active
T051/T052/T053 = 8
No
Ye s
Run as specified by
A152 [PID Ref Sel].
Start and Direction commands come
from P036 [Start Source].
PID Enabled:
A152 [PID Ref Sel] ¹ 0
No
Ye s
Run as specified by P038 [Speed Reference].
Start and Direction commands come
from P036 [Start Source].
No
Ye s
Drive will Start and Run as
specified by A141 [Purge Frequency].
Direction is always Forward.
(1) Refer to
page 50
for
additional
information
on the
operation of
the Hand/
Auto Mode.
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