Rockwell Automation 2364F Regenerative DC Bus Supply Unit (RGU) - Manual (Page 97)

Publication 2364F-5.01– October 2003
Adjusting Voltage and Current Regulation Parameters 9-5
Monitoring the DC Bus Feedback
The DC bus feedback is a measurement of the DC bus voltage. Refer
to Figure 9.4 For a firmware diagram that monitors the DC bus
feedback.
Three different feedback references are available. Each reference
provides the same voltage feedback at a different reference point in
the processor. We recommend that you use the default setting (0) for
P139.
The bus feedback is then scaled. When the feedback select (P219) is
set to "0", the bus feedback is applied to the feedback filter. The
feedback filter is configured using P137 and P138. Finally, P141
provides the DC bus feedback.
Figure 9.4
Firmware Diagram for Monitoring the DC Bus Feedback
kn
256 S + wn
S + wn
Feedback
Scaling
138
137
140 143
16
144
139
1/4
1/4
0
1
2
38
60
61
DC Bus
Feedback
X
X
Y X
X
X
* Indirect, parameter X
Source; parameter X
Sink; parameter X
Parameter X, bit Y
Battery-backed, parameter X
SYMBOL KEY
141
Parameter Number Parameter Name
16 Nominal DC Voltage
38 Host A/D Converter Input 2
60 DSP DC Bus Voltage
61 DSP Averaged DC Bus Voltage
137 Wn, Bus Feedback Filter Bandwidth
138 Kn, Bus Feedback Filter Gain
139 Voltage Input Select
140 Prefiltered Feedback
141 DC Bus Feedback
143 Scaled Bus Feedback
144 Bus Feedback Calibration