98 CHAPTER 9: TROUBLESHOOTING / MAINTENANCE
TRYTON 107/112
AL20 – PROXIMITY SWITCH SQ1 SIGNAL MISSING !
Description
The PLC does not detect input (I5 – SQ1) prior to measuring the new bar during top-cut positioning.
The problem is normally generated by a mechanical obstruction, however it can be caused by switch mis-
adjustment or defective.
Solutions:
Adjust or replace switch SQ1.
Remove any mechanical obstruction keeping the mechanical stop to move.
Press STOP key on the remote control to reset the alarm.
AL21 – END OF BAR SIGNAL SQ8 FAULTY !
Description
The PLC receives inputs (I12 – SQ8) and (I10 – SQ6) simultaneously.
The problem is generated during sequence 2 of the production cycle if the end-of-bar signal (SQ8) is still
active when the transfer device reaches the home position.
Solutions
Adjust or replace switch SQ8.
Remove any mechanical obstruction keeping the connector to move.
Check and replace if necessary the pusher retract cable.
Press STOP key on the remote control to reset the alarm.
AL22 -
Not used.
AL23 – TOP CUT POSITIONING CONFIRMATION 2 MIN. TIME ELAPSED !
Description
This alarm occurs whenever the top-cut position is not reached within the 2-minute safety time allowed.
The problem is normally generated when the hydraulic pressure is not adjusted properly.
Solutions
Make sure the hydraulic pressure is set correctly.
Remove any obstruction that could be preventing the bar from reaching top-cut position.
AL24 -
Not used.
AL25 – LATHE DID NOT RESUME ITS PRODUCTION CYCLE !
Description
Le PLC has not received the signal of the clamping device in automatic production cycle.
Solutions
Check to see if the input changes while opening and closing the clamping device.
Press STOP key on the remote control to reset the alarm.
AL26 -
Not used.
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