
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(h) Auxiliary function lock signal (AFL)
[Classification]
Input signal
[Function] This signal selects auxiliary function lock. That is, this signal disables the execution of speci-
fied M, S, T, and B functions and canned cycle spindle–speed functions.
[Operation] When this signal goes high, the control unit functions as described below.
1 The control unit does not execute M, S, T, and B functions and canned cycle spindle–sig-
nal functions specified for automatic operation or specified by manually entered numeric
commands. That is, the control unit stops the output of code signals and strobe signals
(MF, SF, TF, BF) and the output of the canned cycle spindle control signals SSP, SRV,
and FMF.
2 If this signal goes high after code signal output, the output operation is executed in the
ordinary manner until its completion (that is, until the FIN signal is received, and the
strobe signal goes low.)
3 Among the miscellaneous functions, M00, M01, M02, and M30 are executed even when
this signal is high; all code signals, strobe signals, decode signals are output in the ordi-
nary manner.
4 Among the miscellaneous functions, even when this signal is high, those functions (M98
and M99) that are executed in the control unit without outputting their execution results
are executed in the ordinary manner.
CAUTION Even when this signal is high, spindle control (output of data, including a spindle–speed
command to the PMC, output of a spindle motor voltage command to the D/A converter, and
so forth) is exercised.
(i) Auxiliary function lock check signal (MAFL)
[Classification]
Output signal
[Function] This signal reports the state of the auxiliary function lock signal. The purpose of this signal
is to notify the machine of the status of the auxiliary function lock switch, which can be option-
ally provided in the control unit so that it can be turned on and off on the MDI panel.
[Output Condition]
This signal goes high when:
⋅ The auxiliary function lock signal AFL is high
⋅ The auxiliary function lock switch in the control unit is on
This signal goes low when:
⋅ AFL is low, and the auxiliary function lock switch in the control unit is off
2.3.22 Optional block skip
(a) Optional block skip signals (BDT1 to BDT9 [#1, #2])
[Classification]
Input signals
[Function] These signals specify whether to execute or skip blocks written in a command program ac-
cording to the format allowing optional block skip.
In a command program, a block subject to optional block skip includes “ / ” or “ /n ” (n: 1 to 9).
The optional block skip signals correspond to command programs as indicated in165 the
table below.
Command programs
Optional block skip signals
/ or /1
/2
/3
/4
/5
/6
/7
/8
/9
BDT1
BDT2
BDT3
BDT4
BDT5
BDT6
BDT7
BDT8
BDT9