
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
– 129 –
Override value (%) = 0.01% ×
15
i0
(2
i
Vi)
where
Vi = 0 when the
*JVi signal is high
Vi = 1 when the
*JVi signal is low
The override value is assumed to be zero when all of the signals, (*JV0 to
*JV15) are set high
or low. When this occurs, the feed is stopped. The override value can be specified in the
range of 0% to 655.34% in units of 0.01%. Some examples are listed below.
*JV0 –
*JV15
15 12 8 4 0
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 0 1
0 1 1 0
0 0 0 0
0 0 0 0
1 1 1 1
1 1 1 1
1 1 1 1
1 1 1 1
1 1 0 0
1 0 0 0
0 0 1 1
0 0 0 0
0 0 0 0
1 1 1 1
1 1 1 1
1 1 1 1
1 0 0 1
0 0 0 1
1 1 1 0
1 0 1 1
0 0 0 0
0 0 0 0
1 1 1 1
1 1 1 0
0 1 0 1
1 0 1 1
0 1 1 1
1 1 1 1
1 1 1 1
0 0 0 1
0 0 0 0
0
0.01
0.10
1.00
10.00
100.00
400.00
655.34
0
(0: Signal low 1: Signal high)
[Operation] If rapid traverse selection signal RT is low during manual continuous feed or incremental feed,
the manual feedrate specified by the parameter is overridden by the value specified by the
JVi signal.
NOTE The JVi signals also serve as the override signals during dry run in automatic operation mode.
(c) Manual rapid traverse selection signal: RT
[Classification]
Input signal
[Function] Selects a rapid traverse feedrate for manual continuous feed or incremental feed.
[Operation] When the signal goes high, the control unit operates as described below:
i. The control unit executes the manual continuous feed or incremental feed at a rapid tra-
verse feedrate. The rapid traverse override is validated.
ii. When the signal is switched from high to low or vice versa during manual continuous feed
or incremental feed, the feedrate is decelerated until it reaches zero, then increased to
the specified value. During acceleration and deceleration, the feed axis and direction
selection signal can be kept high.
Rapid traverse
speed
Feedrate selected by manual
feedrate override
J
+J1
RT
1st axis move
CAUTION After the power is turned on, the stored stroke limit function does not work until the reference
position return is completed. During this period, the control unit ignores the RT signal, if it
is set high, and keeps moving the tool at a feedrate selected by the manual feedrate override
signal. A parameter can be specified so that the rapid traverse is validated before the
reference position return is completed.