Troubleshooting; Alarms - LNS QUICK LOAD SERVO S3 T BARFEED Service Manual

10. TROUBLESHOOTING

Errors detected by the PLC will be displayed on the HMI screen.

ALARMS

A. Text alarm
01 Safety Line open!
02 Main access
cover open !
03 Magazine
protection grid
open !
04 Bar feeder not in
working position !
06 Air pressure to
low !
10 Failure on switch
SQ1 !
SERVICE MANUAL – QL Servo S3-T
Description
The lathe or the bar feeder goes
into an emergency
condition.
The problem is generated
anytime the safety line opened.
The PLC does not detect the
input (I2 – SQ10) of the safety
switch on the main access
cover.
The problem is generated when
the main access cover on the
bar feeder is open, exposing
automated mechanical parts.
The PLC does not detect the
input (I3 – SQ11) of the safety
switch on the protection grid.
The problem is generated when
the protection grid on the bar
feeder is open, exposing
automated mechanical parts.
The PLC does not detect the
input (I4 – SQ12) of the safety
switch on the retraction system.
The problem is generated
when the barfeeder has not
been brought into working
position
The PLC does not detect input
(I1 – SP1).
The problem is generated
anytime air pressure is not
sufficient, below 3 bar or 45 psi,
to make the air pressure switch.
The PLC does not detect input
(I8 – SQ1).
Check the states of the emergency stop buttons of
stop barfeed and lathe.
Check the wiring according to the
Electrical drawings.
Check the PLC connection.
Close the main access cover.
Check the switch SQ10.
Close the protection grid cover.
Check the switch SQ11.
Check the barfeeder position.
Check the switch SQ12.
Check the air pressure (min. 3 bar, max. 6 bar).
Set up the air pressure switch SP1.
Replace the air pressure switch SP1.
Check the switch SQ1.
TROUBLESHOOTING
Solutions