Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set User Manual

Page 217

Section 4C

Connecting the 4-axis Servo Module

4C-19

The servo module is equipped with a set of four LEDs located on the front

of the servo module. All four LEDs turn on, then off, at power up. All the

LEDs remain off during normal operation. If a servo fault occurs, the light

for the corresponding axis flashes. The servo fault may occur if the

module is not receiving feedback, or is receiving interrupted or irregular

feedback through the J1, J2, J3 or J4 connector.

A test point is a small metallic pin on the servo module’s circuit board.

There is one test point available in the servo module that you can use to

ground an oscilloscope during testing or troubleshooting. You can locate

this test point, TP6, with Figure 4C.14.

Figure 4C.14

Servo Module Test Point Location

TP6

TB1

(CN1)

TB2

4C.5.5

Servo Module LED

Indicators

4C.5.6

Servo Module Test Points