Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 265)

Section 5A
9/440 Resolver--based CNC/Drive System
5A-19
Figure 5A.7
Examples of Correct and Incorrect Encoder Wiring
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
A +
A--
B+
B--
Z+
Z--
Control Encoder
Control Encoder Control Encoder
Control Encoder
Correct Encoder Wiring -
results in expected motion
Incorrect Encoder Wiring -
results in unpredictable motion
Incorrect Encoder Wiring -
results in a servo fault
Incorrect Encoder Wiring -
results in expected motion
Important: Since positive and negative axis directions can be assigned
without regard to encoder rotation directions, it is possible for the feedback
direction to be “backwards”. This is easily corrected before attempting to
command axis motion through the AMP parameter Sign of Position
Feedback. Refer to your AMP reference manual for more information.
The CNC wiring board provides an easy location to wire additional
hardware. It provides connection for:
analog outputs (typically for spindles)
touch probe
remote I/O
interface between the CNC assembly and power assembly
The main fuse for the 9/440 Resolver--based CNC assembly is also located
on this board.
5A.4
9/440 Resolver- based CNC
Wiring Board