Symptom Table
Symptom
Possible Cause
Corrective Action
There is a bad connection at the
RJH Serial Keyboard Interface
PCB or at the Maincon/MOCON.
Check the cables and connections.
Alarm 546
SERIAL KEYBOARD BUFFER
OVERFLOW, or none of the functions of
the RJH work.
There is a faulty Serial Keyboard
Interface PCB.
Test the RJH for issues.
Machines with SKBIF Version
6.xx.
Alarm 546
SERIAL KEYBOARD
BUFFER OVERFLOW.
The SKBIF firmware is outdated.
Make sure you have SKBIF firmware
version 6.6 or higher. Refer to
procedure.
There is a bad connection at the
RJH Serial Keyboard Interface
PCB or at the Maincon/MOCON.
Check the cables and connections.
The Axis dial selector fails to activate
the selected axis.
The switch selector has been
damaged or contaminated.
Check the RJH for damage or
contamination.
There is a bad connection at the
RJH Serial Keyboard Interface
PCB or at the Maincon/MOCON.
Check the cables and connections.
The Jog Increment selector does not
activate the selected increment.
The switch selector has been
damaged or contaminated.
Check the switch selector for damage or
contamination.
There is a bad connection at the
RJH Serial Keyboard Interface
PCB or at the Maincon/MOCON.
Check the cables and connections.
The Jog Handle pulse encoder does not
generate axis movement.
There is a faulty or contaminated
Jog Handle Pulse Encoder.
Check the jog handle for signs of
contamination or physical damage.
The buttons have been damaged
or contaminated.
Check the RJH for damage or
contamination.
The Start or Feed Hold buttons fail to
start the program or hold the feed.
There is a bad connection at the
RJH Serial Keyboard Interface
PCB or at the Maincon/MOCON.
Check the cables and connections.
Axis pause during jogging, or handle
does not respond to the first few clicks
when starting or changing direction.
Normal operation.
No action required.
Remote Jog Handle - Troubleshooting Guide - CHC
Page 2 of 4 pages
