
16. INTERFACES RELATED TO Series 20i MACRO
B--63003EN--1/02
1280
Feed--per--minute specification
FMIN: When this signal is 1, it puts the machine tool in the
feed--per--minute mode.
Feed--per--revolution specification
FREV: When this signal is 1, it puts the machine tool in the
feed--per--revolution mode.
Constant surface speed function disable
CSF: When this signal is 1, it disables the constant surface
speed function.
Constant surface speed function enable
CSN: When this signal is 1, it enables the constant surface
speed function.
#7
S05R956
#6
S04
#5
S03
#4 #3
FMIN
#2
FREV
#1
CSF
#0
CSN
Timing of constant surface speed, spindle start, stop signals
The following descriptions use the timing chart shown below as an
example.
(1)When the constant surface speed function enable button is pressed, the
PMC sets the CSN signal (bit 0 of R956) to 1 to request MACRO to
put the machine tool in the constant surface speed mode.
(2)When the CSN becomes 1, MACRO sets the SSCE signal (bit 1 of
R957) to 1 to put the machine tool in the constant surface speed mode.
(3)When the SSCE signal becomes 1, the PMC resets the CSN to 0.
(4)When the CSN becomes 0, MACRO resets the SSCE to 0 to terminate
the sequence. This timing chart applies also to the constant surface
speed function disable (CSF) signal, spindle normal rotation (S03),
spindle reverse rotation (S04), and spindle stop (S05) commands (bits
1, 5, 6, and 7 of R956).
1 Signals for enabling or disabling the constant surface speed function and rotating, reversing,
or stopping the spindle (pushbuttons on the machine operator’s panel)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
2 R956 bit0, 1, 5, 6 , 7 (CSN, CSF, S03, S04, S05)
(1)
3 R957 bit1(SSCE)