Rockwell Automation Publication 20B-IN019E-EN-P - July 2013
59
PowerFlex 700 Adjustable Frequency AC Drive – Frames 0…6
Sample Encoder Wiring
Reference Control
Auto Speed Sources
The drive speed command can be obtained from a number of different sources.
The source is determined by drive programming and the condition of the Speed
Select digital inputs, Auto/Manual digital inputs or reference select bits of a
command word.
The default source for a command reference (all speed select inputs are open—
the default setting) is the selection programmed in [Speed Ref A Sel]. If any of
the speed select inputs are closed, other parameters are used as the speed
command source.
Manual Speed Sources
The manual source for speed command to the drive can be selected several ways:
•
The HIM can provide the manual source when:
–
manual control is requested from the HIM (see
ALT Functions
on
page 67
)
or …
–
the I/O terminal block requests manual control through a digital input
programmed for “Auto/Manual.” [TB Man Ref Sel] is then set to one of
the DPI ports with a HIM connected to it.
(1)
•
The I/O terminal block analog input can provide the manual source when
a digital input is programmed for “Auto/Manual” when active. [TB Man
Ref Sel] is set to “Analog Input.”
I/O
Connection Example
I/O
Connection Example
Encoder Power
–Internal Drive
Power
Internal (drive)
12V DC,
250mA
(1)
(1) SHLD connection is on drive chassis (see
page 29
).
Encoder Power
–External
Power Source
Encoder Signal
–Single-Ended,
Dual
Channel
(2)
(2) Example applies to 20B-ENC-1 only.
Encoder Signal
–Differential,
Dual Channel
(1) Requires drive firmware v7.001 or greater and a Series B HIM with firmware v5.004 or greater.
Common
+12V DC
(250 mA)
1
2
3
4
5
6
7
8
to SHLD
(1)
+
Common
External
Power
Supply
to
SHLD
(1)
B
B NOT
A NOT
A
Z
Z NOT
to SHLD
(1)
to Power Supply
Common
1
2
3
4
5
6
7
8
to SHLD
(1)
1
2
3
4
5
6
7
8
B
Z
A NOT
B NOT
Z NOT
A
