Dnc Operation; Unrestricted Length; Position Cancel - YASKAWA MOTIONPACK-110 Descriptive Information

3.6 DNC OPERATION
The motion module with the communication function (JEFMC-C027) enables DNC
operation, that is, concurrent processing in which a part program can be executed while it
is being received by using an RS-422 port of the host computer such as a personal computer.
This function is useful for execution of a large part program exceeding the
Motionpack-ll0 memory capacity (maximum of 64k bytes). The DNC mode is used for
operation. Program execution is the same as in memory operation, but program repetition
instruction cannot be executed.
For transmission protocol and parameter settings, see parameters #1000, #1003,
and #1009.
3.7 UNRESTRICTED LENGTH POSITIONING
The maximum programmable dimension in Motionpack-ll0 basically is restricted to
+99999999 pulses. The unrestricted length positioning function is used to program a
dimension exceeding the maximum value.
For example, the function is used to control the machine which repeats positioning
in the same direction infinitely.
Normally, unrestricted length feed can be made in manual operation (JOG, RAPID,
STEP, or HANDLE), but requires that an incremental movement command (G91) from
the current position is programmed in the memory operation.
However, since the function is of endless operation, the following functions cannot be
used: (Do not set parameters, etc.)
• Pitch error compensation
• Soft limit check function (available for axis used with restricted length.)
• Absolute command (G90)
The current value is displayed in the increment mode on the CRT control station
screen. In other modes, the current value exceeding --+99999.999 is not displayed correctly.
3.8 POSITION CANCEL
Only the current value display universal position in the manual operation mode (JOG,
STEP, RAPID, or HANDLE) can be canceled and set to 0 regardless of the currently
displayed value. However, it does not affect other current value displays (increment
position, axis position).
The function is equivalent to shifting the coordinates to 0 by using G function
reference coordinate system setting G92. Position cancel can be made for each of the X, Y,
and Z axes. See Par. 7.2.3 for operation.
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