4.2,6 ALARMS241 AND242 (Reference Point Return Area Error)
Cause of Trouble
This type of alarm
results when reference
point return performed
manually.
It also occurs by
reference point return
at low speed due to
DECLSchattering.
Occurs at high speed
by error of reference
point pulse
The alarm occurs also
at automatic reference
point return.
Check Method
I
Solution
Observe DECLSchattering: Adjustment or replacement
DGN#1306 D4 (X-axis) of LS
#1306 D5 (Z-axis)
● Failure of 1020 or 1021
Observe reference point pulse: PCB
DGN#1288 D6 (X-axis) Replace ACservo.
X1289 D6 (Z-axis) Replace MB20B.
Replace ACmotor.
PG cable failure
In case of G28 Same as above
In case of G27 Check the program.
4.2,7 ALARMS271 AND272 (P-SET Error)
(Z-axis) at the time of completing positioning
with GOO,G27, G28, G29 and G30.
[)-Set Error results when difference between Check is also required at the time of ERROR
commandposition and machine position does not DETECTON (~#1304 D5=1) and G4 (dowell).
fall within parameters #6056 (X-axis) or X6057
Cause of Trouble Check Method
Solution
Miichine runs too heavy. Measure the load current. Observe
Lighten machine load,
torque motor in case of ACservo.
Servo error pulse
Check error pulse.
Adjust zero point of servo.
exceeds setting range.
Refer to par. 3.3.4.8
If it cannot be adjusted,
Display Numberof Servo Lag Pulses in
replace MB20or Servo Pack.
Operator’s Manual.
Contact YASREP.
-20–
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