
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(j) Strobe signal for external data output (EOSTB)
[Classification]
Output signal
[Function] This signal reports that an address and data have been prepared for external data output.
When this signal goes high, the PMC reads the address and data signals sent with the exter-
nal data output function.
For the output conditions and procedure, see “Basic procedure” described earlier in this sec-
tion.
(k) Read end signal for external data output (EOREND)
[Classification]
Input signal
[Function] This signal reports that the PMC has read data sent with the external data output function.
For the operation and procedure of the control unit when this signal goes high, see “Basic
procedure” described earlier in this section.
(l) External search end signal (ESEND)
[Classification]
Output signal
[Function] This signal reports that a program number search or sequence number search specified with
the external data input function is completed.
[Output Condition]
This signal goes high when:
⋅ A program number search or sequence number search specified with the external data in-
put function is completed
This signal goes low when:
⋅ Automatic operation is started
⋅ The system is reset.
2.3.52 Skip function
(a) Skip signals (SKIP1 [#1, #2], SKIP2, SKIP3, SKIP4); SKIP2, SKIP3, and to SKIP4 are not used with the
15–TT.
[Classification]
Input signals
[Function] These signals terminate skip cutting. That is, the position where a skip signal goes high in
a command program block containing G31.1 (or G31), G31.2, G31.3, or G31.4 is stored in
a custom macro variable, and the move command of the block is terminated at the same time.
Furthermore, in a block containing G04, the dwell command of the block is terminated by pa-
rameter setting. In either case, until all other commands (such as miscellaneous functions)
of the block are completed, machining never proceeds to the next block.
Which of the four skip signals is applicable to blocks containing the G codes can be deter-
mined by parameter setting. The four skip signals can correspond to the G codes on a one–
to–one basis. One skip signal can also be made applicable to multiple G codes. Conversely,
multiple skip signals can be made applicable to one G code.
[Operation] When a skip signal goes high, the control unit functions as described below.
1 When a block contains a G code from G31.3 to G31.4 for skip cutting, and the skip signal
is made applicable by parameter setting to the G code, the control unit reads and stores
the current position of the specified axis at that time. The control unit decelerates and
stops the axis, then cancels the remaining distance that the block was supposed to be
moved.
2 When a block contains a G04 code for dwell, and the skip signal is made applicable by
parameter setting to the G code, the control unit stops dwell operation, and cancels any
remaining dwell time.
3 In other cases, the control unit does not perform any particular operation. Note, however,
that a skip signal is monitored not for a rising edge, but for the high or low state. So, if
a skip signal continues to be high, a skip condition is assumed to be satisfied immediately
when the next skip cutting or skip dwell operation is specified.