Remote i/o adapter (20-comm-r), Controllogix system, Remote i/o adapter (20-comm – Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual User Manual
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106
Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1
Detail Drive Configuration and Operation
Refer to
for
detailed technical papers.
Remote I/O Adapter
(20-COMM-R)
This serves as a supplement to the PowerFlex Remote I/O Adapter User Manual,
publicatio
, addressing items specific to the PowerFlex
700S. Please see the User Manual for details on 20-COMM-R set-up,
configuration, rack configurations, and block transfers.
General facts about the 20-COMM-R (refer to Chapter 4 of the PowerFlex
Remote I/O Adapter Users Manual for details):
•
Remote I/O (RIO) is based on 16-bit integer values
•
Can only be configured as a ¼ or ½ rack. When configured as a ¼ rack, the
reference and feedback are transmitted through block transfer I/O. When
configured as a ½ rack, the reference and feedback are transmitted through
discrete I/O. See Chapter 4 of the 20-COMM-R User Manual for
examples of programming the discrete and block transfer I/O.
•
Datalinks are transferred to and from the drive by block transfer I/O.
ControlLogix System
Here is the I/O image table for the ControlLogix system and a 20-COMM-R
configured as a ¼ rack. Notice that the first 2 words of the image table are
Discrete I/O, the rest of the data comes across as Block Transfer I/O.
No Correction vs Correction Method at 4 kHz and 8 kHz Carrier
Frequencies - Vbus = 650, fe = 60 Hz
Cable Length (Feet)
per Unit Vout/Vbus
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
100
0
200
400
600
300
500
No Correction 4 kHz Carrier
Corrected 4 kHz Carrier
No Correction 8 kHz Carrier
Corrected 8 kHz Carrier