LNS Alpha 538 - Alarm Codes and Descriptions (AL01-AL03)

CHAPTER 9: MALFUNCTIONS 9-2
ALPHA 538/552
1. ALARMS
AL01: Emergency line is open!
Description
The lathe or the bar feeder goes into an
emergency stop condition and does not receive
signal (X10). The problem is generated anytime
there is an open in the safety circuit.
Solutions
Check the PLC connection.
Check the wiring according to the electrical
diagram.
Check the emergency buttons state on the bar
feeder and the lathe.
Press the STOP button on the remote control to
reset the alarm.
AL02: Main cover access open!
Description
The PLC does not detect input (X20 – SQ11). The
problem is generated when the main access cover
on the bar feeder is open, exposing automated
mechanical parts.
Solutions
Close the cover.
Check the SQ11 switch.
AL03: Barfeed not in its working position!
Description
The problem is generated when the bar feeder is
retracted in reduction tube change position or if
the retraction system is not locked.
Solutions
Put back the bar feeder in working position.
Check the SQ10 switch.
Press the STOP button on the remote control to
reset the alarm.