
APPENDIX
B. ALARM LIST
B–62755EN/01
432
Number ContentsMessage
242 ILLEGAL COMMAND IN
G02.2/G03.2
(M series)
An invalid value has been specified for involute interpolation.
S The start or end point is within the basic circle.
S I, J, K, or R is set to 0.
S The number of rotations between the start of the involute curve and
the start or end point exceeds 100.
243 OVER TOLERANCE OF END POINT
(M series)
The end point is not on the involute curve which includes the start point
and thus falls outside the range specified with parameter No. 5610.
244 P/S ALARM
(T series)
In the skip function activated by the torque limit signal, the number of ac-
cumulated erroneous pulses exceed 32767 before the signal was input.
Therefore, the pulses cannot be corrected with one distribution.
Change the conditions, such as feed rates along axes and torque limit,
and try again.
245 T–CODE NOT ALOWEE IN THIS
BLOCK (T series)
One of the G codes, G50, G10, and G04, which cannot be specified in
the same block as a T code, was specified with a T code.
250 Z AXIS WRONG COMMAND (ATC)
(M series)
A value for the Z–axis has been specified in a block for the tool ex-
change command (M06T_) on a system with DRILL–MATE ARC
installed.
251 ATC ERROR
(M series)
This alarm is issued in the following cases (DRILL–MATE):
S An M06T_ command contains an unusable T code.
S An M06 command has been specified when the Z machine coordi
nate is positive.
S The parameter for the current tool number (No. 7810) is set to 0.
S An M06 command has been specified in canned cycle mode.
S A reference position return command (G27 to G44) and M06 com-
mand have been specified in the same block.
S An M06 command has been specified in tool compensation mode
(G41 to G44).
S An M06 command has been specified without performing reference
position return after power–on or the release of emergency stop.
S The machine lock signal or Z–axis ignore signal has been turned on
during tool exchange.
S A pry alarm has been detected during tool exchange.
Refer to diagnosis No. 530 to determine the cause.
252 ATC SPINDLE ALARM
(M series)
An excessive error arose during spindle positioning for ATC. For details,
refer to diagnosis No. 531. (Only for DRILL–MATE)
253 G05 IS NOT AVAILABLE
(M series)
Alarm details
Binary input operation using high–speed remote buffer (G05) or high–
speed cycle machining (G05) has been specified in advance control
mode (G08P1). Execute G08P0; to cancel advance control mode, be-
fore executing these G05 commands.
4500 REPOSITIONING INHIBITED A repositioning command was specified in the circular interpolation
(G02, G03) mode.
4502 ILLEGAL COMMAND IN BOLT
HOLE
In a bolt hole circle (G26) command, the radius (I) was set to zero or a
negative value, or the number of holes (K) was set to zero. Alternatively,
I, J, or K was not specified.
4503 ILLEGAL COMMAND IN LINE AT
ANGLE
In a line-at-angle (G76) command, the number of holes (K) was set to
zero or a negative value. Alternatively, I, J, or K was not specified.
4504 ILLEGAL COMMAND IN ARC In an arc (G77) command, the radius (I) or the number of holes (K) was
set to zero or a negative value. Alternatively, I, J, K, or P was not speci-
fied.