Rockwell Automation 8510 AC Spindle Drive System User Manual User Manual

Page 135

Troubleshooting

Chapter 11

11-131

Table 11.H
Other Faults that Indicate Control Hardware Malfunction

Possible Solutions

Probable Cause

Problem

Main RAM Err
displayed- A parity
or functional error
was detected in
RAM on the Main
Control Board
(CPU Board on
A04/A06 drive).

Replace Main Control Board (CPU Board on A04/A06 drive).

RAM is malfunctioning.

I/O Comm Err
displayed - No
communications
occurring between
microprocessor on
Main Control Board
(CPU Board on
A04/A06 drive) and
microprocessor on
I/O Board.

1. Verify that EPROMs on both the I/O Board and Main Control

Board are inserted correctly.

2. Verify that the I/O Board connectors are fully seated into the

Main Control Board (or CPU Board) connectors.

3. If problem remains, replace I/O Board

4. If problem remains, replace Main Control Board (CPU Board on

A04/A06 drive).

Hardware malfunction on either
I/O Board or Main Control Board
(CPU Board on A04/A06 drive).

Main CPU Loss
displayed - CPU on
Main Control
Board (CPU Board
on
A04/A06 drive)
unable to complete
calculations during
allotted time cycle.

1. Verify that the EPROM on the Main Control Board is inserted

correctly.

2. If problem remains, replace Main Control Board (CPU Board on

A04/A06 drive).

3. If problem remains, contact factory.

Firmware problem or hardware
malfunction on Main Control
Board (CPU Board on A04/A06
drive).

Main Comm Err
displayed - No
communications
occurring between
master and slave
processors on Main
Control Board
(CPU Board on
A04/A06 drive).

1. Verify that the EPROM on the Main Control Board is inserted

correctly.

2. If problem remains, replace Main Control Board (CPU Board on

A04/A06 drive).

Hardware malfunction.

Main Watchdog
displayed - The
watchdog timer on
the Main Control
Board (CPU Board
on A04/A06 drive)
tripped out.

1. Verify that EPROMs on both the I/O Board and the Main Control

Board (CPU Board on A04/A06 drive) are inserted correctly.

2. If problem remains, replace Main Control Board.

3. If problem recurs, contact factory.

The microprocessor on Main
Control Board ran out of execution
time or stopped.

Main A/D Conv
displayed - The
A/D converter on
the main control
board (CPU Board
on A04/A06 drive)
faulted or sensed
excessive offset.

Replace Main Control Board (CPU Board on A04/A06 drive).

Hardware malfunction.

No.