
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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2.3.19 Feedrate override
(a) Rapid traverse override signals (ROV1, ROV2)
[Classification]
Input signals
[Function] These signals override a rapid traverse feedrate.
These two code signals indicate an override value as follows:
Rapid traverse override
ROV2 ROV1
0
0
1
1
0
1
0
1
100%
50%
Fm%1
Fm
2
(0: Signal low 1: Signal high)
1 Fm represents a percentage ranging from 0% to 100% which is specified by parameter
setting (common to all axes).
2 For represents the absolute value of a feedrate ranging from 0 to the rapid traverse fee-
drate which is specified by parameter setting (for each axis).
[Operation] The actual feedrate of rapid traverse in automatic or manual operation (including manual ref-
erence position return) is obtained by multiplying the rapid traverse feedrate specified by pa-
rameter setting by the override determined by these signals.
(b) Signals for overriding the rapid traverse feedrate in 1% units: RV0B to RV6B
This function overrides the rapid traverse feedrate with a value (1% units) entered from the machine opera-
tor’s panel in the range from 0% to 100%.
By specifying the ROV8 bit of parameter 1402, the override selected by this function can be switched to
and from the standard override for the rapid traverse feedrate (F0, Fn, 50%, 100%).
[Classification]
Input signal
[Function] Overrides the rapid traverse feedrate.
The seven binary–code signals correspond to override values of 0% to 100% as shown be-
low:
Override value =
6
i0
(2
i
Vi)
%
where Vi = 0 when the RViB signal is high. Vi = 1 when the RViB signal is low.
Each signal indicates the following override:
RV0B: 1%, RV1B: 2%, RV2B: 4%, RV3B: 8%, RV4B: 16%, RV5B: 32%, RV6B: 64%
When all signals are low or high, the system assumes that the override is 0%. If an override
exceeding 100% is specified, the system assumes that the override is 100%.
For the Series 15–M or 15–T, specify 1 for G40.7. For the Series 15–TT, specify 1 for G120.7.
[Operation] During automatic and manual operation (including manual reference position return), the rap-
id traverse feedrate specified by parameter is overridden with the value specified by these
signals. The tool is moved at the overridden rapid traverse feedrate. .pa (p.65)
(c) Feedrate override signals (FV0 to
FV7 [#1, #2])
[Classification]
Input signals
[Function] These signals override a cutting feedrate.
Eight binary code signals are provided. The relation between these signals and an override
is expressed as follows:
Override =
7
i0
(2
i
Vi)
%
where, Vi = 0 when FVi is high
Vi = 0 when
FVi is low