Use the display on the CNC screen
If alarm 926 is issued, information such as the following is displayed at
the bottom of the CNC screen. It can be used to identify the defective
location.
MODE
information
STATUS
information
Bits Bits
Bits 12 to 15 of the MODE information indicate the number of the slave
in which the alarm occurred. The unit nearest the CNC (such as a servo
amplifier) is assigned a slave number of “0”. For a 2–axis amplifier, for
example, one number is assigned for the first axis, and the next number
is assigned for the second.
Details of the MODE information
Bit 15 14 13 12 11 0
De-
scrip-
tion
Number of the slave in
which the alarm oc-
curred
No meaning
0000: Indicates that the alarm occurred in slave 0.
0001: Indicates that the alarm occurred in slave 1.
:
:
1001: Indicates that the alarm occurred in slave 9.
Using the bits of the STATUS information, the fault can be estimated.
Details of the STATUS information
Bit 15 12 11 10 9 87 6 5 4 30
Description
No meaning
External alarm
Broken master port
Broken slave port
No meaning
Broken master port
No meaning
Error on slave
No meaning
A xxxx 0 0 0 xxx 1 x 0 xxxx
A xxxx 0 1 0 xxx 0 x 1 xxxx
B xxxx 0 0 1 xxx 0 x 1 xxxx
C xxxx 1 0 0 xxx 0 x 1 xxxx
The STATUS information matches any of the patterns A, B, and C.
(x indicates a bit that may be either 0 or 1.)
D Identifying the defective
location
11. TROUBLESHOOTING
GFKE-0222-EN
806