
B–63503EN–1/01
15. PMC CONTROL FUNCTION
779
#7
3709
#6 #5 #4 #3 #2
MSI
#1 #0
[Data type] Bit type
MSI In multi–spindle control, the SIND signal is valid:
0 : Only when the first spindle is selected. (SIND signal for 2nd and 3rd
spindle become invalid)
1 : For each spindle irrespective of whether the spindle is selected. (Each
spindle has its own SIND signal.)
NOTE
1 If the spindle fails to move after the PMC issues the spindle
motor speed command, check the following:
Type A is selected (the MSI bit, bit 2 of parameter No. 3709,
is set to 0) when the multispindle control function is used.
→ The second spindle cannot be controlled. The first
spindle can be controlled only when the spindle selection
signal SWS1 is set to “1”.
The spindle stop signal for each axis is set to “0” when the
multispindle control function is being used.
→ Spindle stop signal for each axis *SSTPx <G027, #3, #4>
stops the spindle.
M03/M04 is not specified when the CNC is being used to
control the output polarity.
→ If the TCW bit, bit 7 of parameter No. 3706, is set to 1, the
M03/M04 command issued to the CNC changes the
output polarity for the spindle motor. If no M03/M04
command is specified after the CNC is turned on, the
specified speed output is not sent to the spindle motor
because the output polarity has not been determined.
2 The SF signal indicates that output of the S code to the PMC
has been completed. The signal does not indicate the end
of the command for specifying the spindle speed.
3 For an explanation of connecting the second spindle, see
Sections 9.2 SPINDLE SERIAL OUTPUT/SPINDLE
ANALOG OUTPUT and 9.9 MULTI–SPINDLE CONTROL.
4 If the multispindle control function is not being used, the
CNC does not issue any commands to the second spindle.
The output polarity is controlled by the SGNx signal. It is not
affected by the SSINx signal.
The speed output to the spindle motor can be controlled
only when the SINDx signal is set to “1”.
Note