Rockwell Automation SB3000 Configuration and Programming - Manual (Page 39)

Configuring the UDC Module’s Registers 3-21
Voltage Reference Register 102/1102
The value in the Voltage Reference register is the desired DC bus
voltage. This value is the main input into the voltage loop on the PMI
Processor. The loop is enabled in register 100/1100, bit 0. Sug. Var. Name: VDC_REF%
Units: Volts
Range: See text
Access: Read/Write
The minimum value is 1.414 times the RMS value of the AC line voltage plus 10%. The maximum value is
875V. If the value is outside this range, register 203/1203, bit 4 (WRN_RIL@) will be set.
Power Factor Current Reference Register 103/1103
The value in this register is the reference to the leading power factor
logic in the voltage regulator. If there is extra leading power factor
capacity, the SB3000 Rectifier can compensate for other machines
on the AC line that produce lagging power factors. Sug. Var. Name: IPF_REF%
Units: RMS Amps
∗
10
Range: Limited by
rectifier capacity
Access: Read/Write
This value selects the minimum RMS current that will be commanded independent of load. A value of 0
disables the power factor correction. The maximum current that can be commanded is a function of input
voltage, load requirements, and rectifier capacity. If the DC bus current is high, the reactive current will be
limited and register 203/1203, bit 3 will be set.
The value is entered in RMS Amps times 10. For example, 60.0 amps is entered as 600.
Refer also to the description of VAR feedback register 211/1211. The VAR Feedback register contains the
VARS (volt-amperes reactive) produced by the Rectifier in response to the reference in register 103/1103.
Test Code Register 105/1105
The value entered in this register is used as data for the built-in
bridge test procedures commanded by the Drive Control register
(100/1100). See Appendix G for detailed information on performing
the bridge test. Sug. Var. Name: TST_CODE%
Units: See text
Range: N/A
Access: Read/Write
PMI D/A Output Register 106/1106
The value in the PMI D/A Output register is used to pass a variable in
the UDC to the PMI Processor to be displayed on one of the four PMI
meter ports. See section 3.7.2. Sug. Var. Name: PMI_DA%
Units: See text
Range: See text
Access: Read/Write
This register can be used to display any variable in the AutoMax system as long as it is a 16-bit integer.
Double-integer or floating point values cannot be displayed on the PMI Processor’s D/A meter ports. The
desired value must be copied into this register by an application task. The value in the register is transmitted
to the PMI Regulator at the end of every scan.