Rockwell Automation SD3000 Drive Configuration, Programming - Manual (Page 39)

101 /1 101 I/O Control Register (Continued)
Bit: 15
Hex Value: 8000H
Sug. Var, Name: UDC_LB@
Range: N/A
Access: Read/Write
UDC Error Code: N/A
LED: N/A
Description: The UDC Module External Loopback bit is set to enable the external loopback test on the
UDC module’s fiber-optic ports. Register 101, bit 15 controls the COMM A test while register 1101, bit 15
controls the COMM B test. Note that this bit must be set to 0 before the loopback connector is removed
from the UDC module’s fiber-optic ports. Refer to the Fiber-Optic Cabling instruction manual (S-3009) for
additional information.
102/1 102 Armature Test Angle Register
Hex Value: N/A
Sug. Var. Name: CML_ALPHA%
Range: 5 to 180
Access: Read/Write
UDC Error Code: N/A
LED: N/A
Description: The value in the Armature Test Angle register is the firing angle for the armature alpha test.
Firing angles can range from 180” (full off) to
(full on). Any value outside of this range is internally
clamped to be within the limits. The forward or reverse bridge is selected through bits 2 and 3 of the Drive
Control registers 100/1 100. Note that the default value is 0 and the motor must-be disconnected for the
test to execute.
W A R N I N G
THE PROGRAMMER MUST WRITE THE FIRING ANGLE VALUE INTO THE ARMATURE TEST
ANGLE REGISTER (102/1102) BEFORE ENABLING THE ARMATURE ALPHA TEST. THE
A C T U A L M O T O R A R M A T U R E M U S T N O T B E I N T H E C I R C U I T . U N C O N T R O L L E D M A C H I N E
OPERATION MAY RESULT IF THIS PROCEDURE IS NOT FOLLOWED. FAILURE TO OBSERVE
THIS PRECAUTION COULD RESULT IN BODILY INJURY
103/1 103 Armature Current Reference Register
Hex Value: N/A
Sug. Var. Name: CML_REF%
Range: -4095 to +4095
Access: Read/Write
UDC Error Code: N/A
LED: N/A
Description: The value in the Armature Current Reference register contains the current reference for the
armature current minor loop. It is scaled so that the maximum current limit value that was entered as a
configuration parameter has a value of 4095. Any value written here will be limited internally to not exceed
+/- 4095. A positive value in this register will turn on the forward bridge. If a regenerative Power Module
is being used, a negative value in this register will turn on the reverse bridge. Refer to registers
207/1207
(current feedback in counts) or registers 208/1208 (current feedback in amperes) for more information.
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