
B-63790EN/01 4.DESCRIPTION OF PARAMETERS
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(sec/block specification) (02h) , Feed per revolution (12h) , Skip
(13h) , and External pulse synchronization (1Bh) commands.
It also affects the feedrate specified in the Cutting feed (feed per
minute ) (01h) , Feed per revolution (12h) , and Skip (13h)
commands. If parameter RPD (bit 2 of parameter No. 1409) = 1, the
feedrate specified in the Rapid traverse (00h) , Machine coordinate
system selection (06h) , and 1st. to 4th. reference position return (17h
to 1Ah) commands are also affected by this parameter, because the
rapid traverse rate is specified using the PMC signal. If parameter
RPD (bit 2 of parameter No. 1409) = 0, the actual feedrate is not
affected by this parameter, because it is set to the rapid traverse rate
specified in the corresponding parameter.
For the Cutting feed (sec/block specification) (02h) command, the
travel time remains unchanged from the value specified in command;
it is not affected by this parameter.
For the Machine coordinate system selection (06h) command, the
target position is not affected by this parameter. Instead, it is specified
in diameter, if bit 3 of parameter No. 1006 (specification by diameter)
= 1.
(Example) If the specified amount of travel is 100.000 mm and the
specified feedrate is 100 mm/min
PMC signal-based command
NDI = 0 NDI = 1
Memory operation-
based command
Feedrate 100mm/min 50mm/min 100mm/min
Position display 200.000mm 100.000mm 100.000mm
Actual machine
travel
100.000mm 50.000mm 50.000mm
Travel time 60 sec 60 sec 30 sec
CAUTION
1 This parameter is valid only when parameter DIA
(bit 3 of parameter No. 1006) = 1.
2 If a programmable diameter/radius switching is
used, that is, parameter PDC (bit 5 of parameter
No. 1001) = 1, parameter PDA (bit 3 of parameter
No. 1009) usually specifies whether diameter or
radius is to be used. For the PMC axis, however,
parameter NDI and parameter DIA (bit 3 of
parameter No. 1006) are used to determine the
amount of travel and the feedrate. On the other
hand, whether the position display is displayed as
a diameter or radius is determined by parameter
PDA (bit 3 of parameter No. 1009) .