Rockwell Automation 2364F Regenerative DC Bus Supply Unit (RGU) - Manual (Page 172)

Publication 2364F-5.01– October 2003
D-28 Programming Parameters
127
Bus Reference Change Rate
[Ref Change Rate]
This parameter specifies the maximum increase
or decrease allowed in the Bus Rate Reference
(P126) per 5ms.
The bus rate limiter uses this value to produce the
rate limited Bus Reference (P128).
Parameter Type Sink (Read/Write)
Display Units % of P16
Drive Units Display Units * 4096/100
Factory Default 0.24
Minimum Value 0.00
Maximum Value 280.00
Related Parameters P126, P128
128
Bus Reference
[Bus Reference]
This parameter indicates the voltage that needs to
be supplied to the DC bus.
The RGU compares the voltage needed by the DC
bus (P128) with the Bus Feedback (P141). The
difference (P128-P141) signifies the Bus
Parameter Type Sink (Read/Write)
Display Units % of P16
Drive Units Display Units * 4096/100
Factory Default 0.49
Minimum Value 0.00
Maximum Value 280.00
Related Parameters P126, P128
Error (P142). The PI regulator determines the
gain required, and an Iq Reference (P96) directs
the RGU to supply the required voltage.
129
Bus Reference Automatic
[Bus Ref Auto]
This parameter sends the calculated bus voltage
that needs to be supplied to the DC bus.
This value is determined by a function of the
measured AC voltage and the nominal AC and DC
voltages (P10, P14, P16).
Parameter Type Source (Read/Write)
Display Units Volt
Drive Units Display Units * 4096/P16
Factory Default 0.85 x P16
Minimum Value 0.85 x P16
Maximum Value 1.15 x P16
Related Parameters P123, P128, P130
This parameter is the default input used for the
Bus Reference (P128), which is selected by the
Voltage Mode Selector (P123).
130
Automatic Bus Reference Tracking
[AutoRef Tracking]
This parameter specifies the percentage over (or
under) the calculated nominal DC bus voltage
(P14 x sqrt(2)) to be commanded through the Bus
Reference Automatic (P129).
Parameter Type Sink (Read/Write)
Display Units % of (P14 x sqrt(2))
Drive Units Display Units * 5793/100
Factory Default 4.2
Minimum Value -5.0
Maximum Value 10.0
Related Parameters P14, P123, P129
For example, if an RGU is supplied with 460V AC, the
calculated nominal DC bus voltage would be 650V
(460V x sqrt(2)). The bus reference calculator would
multiply this 650V x P130 (4.2% ,default) resulting in
27V DC, which would be added to the calculated
Nominal DC Bus Voltage and be stored in P129
(Automatic Bus Reference), which would command
that the DC bus be supplied with 683V DC.
131-136
P131-P136 are for internal use only.