MAINTENANCE AND FAULT FINDING
EPT031055 Issue 2 September 2017 5-7
STATUS MESSAGES AND SUGGESTED 
ACTIONS
The F-Series will display messages in the control unit display. The
messages are listed in the following tables with actions where appropriate:
System Status Messages
  
Status Message Cause Suggested Action
1 No 
communication 
with DSP.
No response from 
the DSP part of the 
control system 
during running.
Turn off the controller. Check 
boards are all connected, 
restore backup, restart the 
controller.
2 Failed to start 
controller 
system.
DSP Initialisation 
failed.
Turn off the controller. Check 
boards are all connected, 
restore backup, restart the 
controller.
3 DSP watchdog 
fault.
The SBC did not 
respond to a DSP 
request.
Turn off the controller. Check 
boards are all connected, 
restore backup, restart the 
controller.
4 Laser watchdog 
fault
The laser has been 
firing for longer than 
expected.
Contact Domino.
5 Print go while 
printing.
A print go trigger has 
been received while 
the laser is busy 
printing.
Check that the print go signal 
does not have switch bounce, 
check the time taken to print 
vs the print repeat time.
6 Encoder loop: 
Period too small.
Encoder based 
continuous printing 
feature generates the 
next print while the 
previous print is not 
finished.
Reduce the print distance or 
reduce width of the message.
7 Print go while 
DSP data not 
ready.
There is no valid data 
in the DSP when a 
print go is received.
Make sure the printer is ready 
before generating a print go. 
Switch off 'Force Recompile' 
after print.
8 Print go while 
DSP data not 
ready
A new print is 
currently being 
compiled and no 
print start can be 
issued until the 
printer is ready 
again.
Monitor 'compile OK' line high 
when data compiled and 
make sure that you don't 
trigger a print before it is high 
again after a data change.