
8. ALARM LIST
481
No. ContentsMessage
241 ILLEGAL FORMAT IN
G02.2/G03.2
(M series)
The end point, I, J, K, or R is missing from
a command for involute interpolation.
242 ILLEGAL COMMAND IN
G02.2/G03.2
(M series)
An invalid value has been specified for in-
volute 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 PRM5610.
244 P/S ALARM
(T series)
In the skip function activated by the torque
limit signal, the number of accumulated er-
roneous 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.
246 ENCODE PROGRAM
NUMBER ERROR
During read of an encrypted program, an
attempt was made to store the program
with a number exceeding the protection
range.
(See PRM3222 and 3223.)
247 ILLEGAL CODE USED
FOR OUTPUT
When an encrypted program is output, EIA
is set for the punch code. Specify ISO.
250 Z AXIS WRONG COMMAND
(ATC)
(M series)
Movement along the Z–axis is specified in
a block specifying a tool change command
(M06T_). (Only for ROBODRILL)
251 ATC ERROR
(M series)
This alarm is issued in the following cases:
S An M06T_ command contains an unus-
able T code.
S An M06 command has been specified
when the Z machine coordi nate is posi-
tive.
S The parameter for the current tool num-
ber (PRM7810) 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 command 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 ig-
nore signal has been turned on during
tool exchange.
S A pry alarm has been detected during
tool exchange.
Refer to DGN530 to determine the cause.
(Only for ROBODRILL)