Rockwell Automation 2364F Regenerative DC Bus Supply Unit (RGU) User Manual

Page 96

Publication 2364F-5.01– October 2003

9-4

Adjusting Voltage and Current Regulation Parameters

1. Identify the source of the DC bus reference:

2. Set the constant bus reference value, if required:

3. Set the auxiliary bus reference, if required:

4. Set the parameters for automatic bus referencing, if required:

If the RGU is run in parallel with an NRU, then P35 bit 0 must be set
to 1, and P123 must be set to 3.

5. The RGU compares the DC bus voltage command with both the

minimum (P124) and maximum (P125) bus reference voltages, as
shown in Figure 9.3 to ensure that the DC bus voltage command
value is valid. Refer to P126 for an adjusted DC bus voltage
command that falls within the minimum and maximum limits.

6. Set P127 to the desired rate of bus change. You may select a rate

from 0%/5 ms to 280%/5 ms. P128 contains the resulting DC bus
reference.

If you want the bus reference to be:

Then, set P123 to:

A constant voltage

A voltage set by an auxiliary source

The sum of a constant value and an auxiliary source

Adjusted automatically to follow the line voltage

If you set P123 to:

Then:

0 or 2

Set P207 to the desired DC bus voltage.

If you set P123 to:

Then:

1 or 2

Set P122 to the desired auxiliary bus voltage.

If you set P123 to:

Then:

(1) Set P35, bit 0 to “1” for regeneration only.
(2) The RGU will regulate to a bus voltage equal to the

peak of the AC line plus a percentage of the peak,
as defined by P130. Enter a value between -5% and
+10% in P130.

(3) P129 will display the bus voltage that is being

commanded by the automatic bus reference
function.