
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(e) Serial interface spindle control signals
These signals control the serial interface spindle.
(i) Torque limit command low signals (TLMLA, TLMLB)
(ii) Torque limit command high signals (TLMHA, TLMHB)
[Classification]
Input signals
[Function] Limit the spindle motor torque. The limit is specified by a spindle parameter.
[Operation]
TLMLA (B)
TLMHA (B) Description
0
0
1
1
0
1
0
1
No torque rimit
Limited to the value set by a paremeter
Limited to about half of TLMHA (B)
Limited to about half of TLMHA (B)
(iii) Clutch/gear signals (CTH1A, CTH1B, CTH2A, CTH2B)
[Classification]
Input signals
[Function] Set up the following conditions according to the states of the clutch and gear. The conditions
are used to select a spindle control parameter.
[Operation]
CTH1A (B)
CTH2A (B) Description
0
0
1
1
0
1
0
1
HIGH GEAR
MEDIUM HIGH GEAR
MEDIUM LOW GEAR
LOW GEAR
(iv) Reverse rotation command signals (SRVA, SRVB)
(v) Forward rotation command signals (SFRA, SFRB)
[Classification]
Input signals
[Function] Specify the direction of the spindle motor rotation as viewed from the shaft.
[Operation]
SRVA (B)
SFRA (B) Description
0
0
1
1
0
1
0
1
Stop
Forward rotation (CCW: Counter–clockwise
direction)
Reverse rotation (CW: Clockwise direction)
Stop
(vi) Spindle orientation command signals (ORCMA, ORCMB)
[Classification]
Input signals
[Function] Used for spindle orientation control.
[Operation] When the signal is high, spindle orientation control is performed.
(vii)Machine ready signals (MRDYA, MRDYB)
[Classification]
Input signals
[Function] Turn on and off the electromagnetic contactor in the spindle servo unit.
[Operation] Low: The contactor is turned off.
High: The contactor is turned on.