[Minesterran]

Hi, I'm having some issues with a Mitsubishi Meldas M320LC-V NC controller (Serial number: 3V656270626) which is installed in a Citizen Cincom E16J double turret lathe. In the operator panel shows many alarms EX001 Thermal, 002 Fuse, 003 Main Spindle, 004 Back Spindle, etc. I checked the wiring all around the machine looking for any shortcircuit but it's all OK. The machine is in an Hold Emergency State without the E-Stop pushed (the state cannot be changed). I checked the R69 DIAGN parameter and the bit E is in 0 (suppose the error is EMERGENCY STOP OUTPUT BASED ON PLC SOFTWARE).

I dont know how to fix this problem, either if it is a hardware or softare problem.

Thanks

[Minesterran]

The MC311 was not connected correctly. I fixed the problem and the machine started with no alarms.

Now, I'm facing another problem when I try to run the spindle and back spindle with M3 and M23. The panel throws EX117 MAIN SPINDLE RPM ALARM y EX118 BACK SPINDLE RPM ALARM, which is very strange because I can easily move the axis and tool turrets.

Any advice is welcome (the drives of the spindles are FREQROL Z200).

Best regards,

[Rokkin]

Does the spindle even try to rotate?? If not, maybe the Z200 drive is not getting the run signal.

[Minesterran]

The MC311 had a problem. One of the IC's was burnt (strange, because all the capacitors and transistors were OK). It was replaced and now the machine is running.

How did I figure it out the problem was in the MC311? In the NC, there was another MC311, I switched them and the problem changed (all the panel lights were turned on).