Yaskawa Yasnac PC NC - Manual (Page 164)

YASNAC PC NC Operating Manual Chapter 4: Maintenance
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(2) Alarm Nos.: 2061 to 2068 (Reference Point Return Area Error)
Table 4.1.5.2 Troubleshooting - Alarm Nos.: 2061 to 2068 (Reference Point Return
Area Error)
(3) Alarm Nos.: 2071 to 2078, 2081 to 2088 (Reference Point Return Position Error)
Table 4.1.5.3 Troubleshooting – Alarm Nos.: 2071 to 2078, 2081 to 2088 (Reference
Point Return Position Error)
CAUSE CHECK ITEM COUNTERMEASURES
The reference
point return start
point is at the
zero point side
of the decelera-
tion limit switch. Deceleration limit switch (DECLS)
If reference point return is started from a point
located at the reference point side of DECL (point C)
as shown below, an alarm occurs.
Note:This error check is not made before the execu-
tion
of manual reference point return after the power
is turned ON.
Return the axis to a position on
the deceleration LS or away
from it and, then, execute refer-
ence point return once again.
Approach fee-
drate is too fast. Compare the setting for the approach feedrate param-
eter with the parameter list. Change the setting for parame-
ters pm2521 to pm2525 to an
appropriate value.
CAUSE CHECK ITEM COUNTERMEASURES
Alarm in manual reference
point return operation Check if the error occurs every time. Contact machine tool builder
or your Yaskawa representa-
tive.
Alarm in automatic refer-
ence point return operation G28: Check if the alarm occurs every time. Contact machine tool builder
or your Yaskawa representa-
tive.
G27: Check the point specified in the pro-
gram if it agrees with the zero point.
Review the program.
#3073 DO (1st axis)
#3073 D1 (2nd. axis)
#3073 D2 (3rd axis)
#3073 D3 (4th axis)
#3073 D4 (5th axis) Execute reference
point return again
while observing the
I/O signal monitor
screen