
B–64113EN–1/01
18. TROUBLE DIAGNOSIS
1119
As a result of CNC alarm diagnosis, the alarm may be caused by machine
trouble.
Considering such a case, it is possible to jump to MTB’s guidance table
from CNC guidance table by the special message IDs starting with ”M”.
If the flowing special message IDs stating with ”M” are created in MTB’s
guidance table, a jump to MTB’s guidance table from CNC guidance table
becomes available.
No. Message ID Alarm name Presumed cause
1 M205 Rigid mode DI OFF The rigid mode DI signal (G061.0) is not set to 1 when the
rigid tapping is executed.
2 M409 Abnormal load detected A mechanical collision or twist occurred, resulting in a load
torque higher than a normal operation value.
3 M410 Excessive stop error A mechanical collision or twist occurred, disabling an axis
from reaching a target position.
4 M411 Excessive move error A mechanical collision or twist occurred, disabling an axis
from moving.
5 M420 Excessive torque
difference
Two axes to be moved synchronously lost mechanical syn-
chronism with each other, resulting in a large torque differ-
ence.
6 M421 Excessive semi–closed
loop error
With a closed–loop machine, a shift occurred between the
motion of the motor and the motion of the separate detector
for a cause such as a mechanical twist.
7 M436 OVC alarm A mechanical collision or twist occurred, resulting in a large
load and the flow of an excessive current.
CAUTION
All message IDs starting with ”M” are reserved for a jump to
MTB’s guidance table from a CNC guidance table.
In the future, a message ID to which a jump is made from
a CNC guidance table may be added. So, do no use a
message ID starting with ”M” which may or may not be
included in the table above for the other purpose.
Jump from CNC
guidance table to MTB’s
guidance table
Reserved message IDs