[kolobolo]

Hello. We have an old Leadwell MCV-1300D machine, controlled by Fanuc 0m-a, with 20 tool umbrella type ATC. When we try to change tool it gives error "1039 Tool No. > 20"

We restored all parameters from backup, checked and rechecked them again, but still problem remains. I am afraid, that PLC somehow lost tool number in umbrella, or thinks that tool number in spindle is to big. But how to get to the PLC? What can be wrong?

Please help!

P.S. We don't have any documentation on this machine.

[spark-el]

Check the inputs for tool holder returned on that arm. If you don't have documentation, look to see if there are proximity switches with LED's on them and compare #20 with the others. Also the input for arm extended should be off.