
B–63173EN–1/01
12. DISPLAY/SET/EDIT
443
When a breakdown occurs, in order to quickly determine the cause, the
following should be done.
First, it has to be determined as to whether the breakdown occurred in the
CNC internal section, or the PMC or machine side.
There are times when it appears that a breakdown has occurred even when
the breakdown has not actually occurred. For example, when the
machinery ceases to operate because it is waiting for an external signal.
In this case, the condition of the interface between the CNC and PMC, or
between the CNC and the machinery, and the conditions within the CNC
need to be investigated.
The CNC checks the following itself.
1) Abnormality of detection system
2) Abnormality of position control unit
3) Abnormality of servo system
4) Overheat
5) Abnormality of CPU
6) Abnormality of ROM
7) Abnormality of RAM
8) Abnormality in data transfer between MDI
9) Abnormality of part program storage memory
10)Abnormality in tape reader read function
11)Abnormality in data transfer between PMC
Input/output signals from PMC to CNC, or vice versa, and inner status
of the CNC can be displayed on the screen.
OPERATOR’S MANUAL
(B–63174EN)
IV.7.3 CHECKING BY SELF–DIAGNOSTIC
SCREEN
12.1.7
Self–diagnosis
General
Reference item