Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 749)

Section 15A
Troubleshooting the Control
15A-39
MARKER NOT FOUND The axis has not yet encountered an encoder marker/null.
MARKER FOUND The axis has encountered an encoder marker/null since last
reset or power up.
The status of the distance from marker/null is reset whenever there is a loss
of feedback or power to the control.
These are real time displays, response is limited only by delays in screen
updates.
Pressing the exit softkey (up arrow) at any time displays the Main
Diagnostics Menu screen.
When you use the Axis Monitor screen during solid tapping, the position
loop type, gain, and acceleration ramp of the AMPed tapping axis matches
that of the spindle. This may result in a monitored following-error
magnitude for these two axes that is different while in solid-tapping mode.
When they are not in solid tapping mode the monitored following-error
magnitude for these axes is the same.
If you are starting up a 9/440 system, the following screen is available to
help you determine what servo faults, if any , exist on your system prior
to attempting to run the machine. Select the [1394 DRIVE] softkey under
the [MONITOR] section of the [SYSTEM SUPPORT] softkey.
(softkey level 3)
RING
I/O
REMOTE
I/O
FAST
I/O
AXIS
MONTOR
SERIAL
I/O
(softkey level 3)
DATA
SCOPE
SEARCH
MONTOR
1394
DRIVE
15A.7.2
1394 Drives
Diagnostics Screen