Mitsubishi Electric MELDAS C6 Interface Manual page 286

B con-
Signal name
tact
SPINDLE REVERSE RUN
—
START
[Function]
This signal is issued to the high-speed serial connection specification spindle controller (spindle
drive). When the signal turns ON, the spindle motor starts rotating in inverse direction (CW as
viewed from the shaft side).
[Operation]
Spindle motor starts running at speed specified by S command (S analog data) when the spindle
reverse run start signal (SRI) is turned ON.
When the spindle reverse run start signal is turned OFF, spindle motion decelerates and stops
(transistor base current is shut off).
(1) Spindle motor stops if "Spindle reverse run start" signal (SRI) and "Spindle forward run start"
signal (SRN) turn ON at the same time. To resume reverse run, both signals OFF once and
then turn the spindle reverse run start signal ON.
(2) The operation may stop during reverse run due to emergency stop, spindle alarm or resetting.
Turn the spindle reverse run start signal OFF and ON once after the "Servo ready" signal (SA)
turns ON.
(3) The motor will not run if the S analog data is 0. The motor will run at the corresponding rotation
speed when the S analog data changes.
(4) When "Spindle orient command" signal (ORC) is turned ON at the same time "Spindle reverse
run start" signal (SRI) is turned ON, priority is given to the former signal.
[Related signals]
(1) Spindle forward run start (SRN: YD38)
(2) Spindle orient command (ORC: YD3E)
B con-
Signal name
tact
SPINDLE TORQUE
—
LIMIT 1, 2
[Function]
This signal is issued to the high-speed serial connection specification spindle controller (spindle
drive). When the signal turns ON, spindle motor torque is reduced temporarily.
The signal is used in mechanical spindle orientation, or gear shift.
[Operation]
There are a spindle torque limit 1 (TL1) and spindle torque limit 2 (TL2) signal.
The spindle torque limit ratio is set to the spindle parameter.
The spindle torque limit ratio parameter which is used is determined by the combination of spindle
torque limit 1 (TL1) and spindle torque limit 2 (TL2).
TL2
0
1
1
(Note 1) These signals are valid only for systems that are high-speed serially connected with the
spindle controller.
6. EXPLANATION OF INTERFACE SIGNALS
6.3 PLC Output Signals (Bit Type: Y***)
Signal
abbreviation
SRI
Signal
abbreviation
TL1, TL2
Selected spindle torque limit
TL1
ratio parameter
1 SP021
0 SP049
1 SP050
1st spindle
YD39
1st spindle
YD3A, D3B
Standard set
value
10
20
30
6-3-89
2nd spindle 3rd spindle
YD69 YD99
2nd spindle 3rd spindle
YD6A, D6B YD9A, D9B
Setup range (unit)
1~120(%)
1~120(%)
1~120(%)