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The reference position return cannot be performed normally because the reference position return start point is too close to the reference position or the speed is too slow. Separate the start point far enough from the reference position, or specify a sufficiently fast speed for reference position return. Check the program contents.

When entering data in the memory by using Reader / Puncher interface, though the read terminate command is specified, input is not interrupted after 10 characters read. I/O unit or P.C.B. is defective.

When entering data in the memory by using Reader / Puncher interface, the ready signal (DR) of reader / puncher was turned off. Power supply of I/O unit is off or cable is not connected or a P.C.B. is defective.

When entering data in the memory by using Reader / Puncher interface, an overrun, parity or framing error was generated. The number of bits of input data or setting of baud rate or specification No. of I/O unit is in correct.

In automatic tool length measurement or automatic tool compensation (G36, G37), an invalid axis was specified or the command is incremental. Modify the program.

H code and automatic tool compensation (G37) were specified in the same block. (Automatic tool length measurement function) Modify the program. T code and automatic tool compensation (G36, G37) were specified in the same block. (Automatic tool compensation function) Modify the program.

Tool length automatic measurement (G37) was specified without a Hcode. (Automatic tool length measurement function). Automatic tool compensation (G36, G37) was specified without a Tcode. (Automatic tool compensation function) Modify the program.

In the automatic tool length measurement function (G37), the measurement position reach signal (XAE, YAE, or ZAE) is not turned on within an area specified in parameter 6254 6255. In the automatic tool compensation function (G36, G37), the measurement position reach signal (XAE or ZAE) is not turned on within an area specified in parameter 6254 . This is due to a setting or operator error.

In memory or program collation, a program in memory does not agree with that read from an external I/O device. Check both the programs in memory and those from the external device.

A program number or a sequence number which was specified by address P in the block which includes an M98, M99, M65 or G66 was not found. The sequence number specified by a GOTO statement was not found. Otherwise, a called program is being edited in background processing. Correct the program, or discontinue the background editing.