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05.91
8 Spindle/PLC Interface (DB 31)
8.2 Signals from spindle
Signal chart
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0
1
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3
4
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5
6
1:
CHANGE GEAR signal
2:
Feedback signal from gear to PLC: "Gear engaged"
3:
Actual spindle motor speed
4:
Set value for oscillation speed
5:
Oscillation, change gear
6:
Gear engaged, accelerate spindle motor
Sequence:
•
Controlled by NC:
– New set gear stage determined and output to interface.
– CHANGE GEAR interface signal changes from 0 to 1.
•
Controlled by PLC user program:
– Spindle decelerated to zero speed.
– Spindle motor accelerated to oscillation speed (OSCILLATION SPEED and SET
ROTATION CW interface signals).
– The direction of rotation of the motor is reversed in order to facilitate gear engagement
(SET ROTATION CW interface signal).
– The user program recognizes that the gear has engaged (e.g. by the "Gear engaged"
signal from the gearbox). The new actual gear stage must then be entered in the
interface (DW K + 1, bit 0 to 2) and the CHANGE GEAR interface signal has to be
reset.
•
Controlled by NC:
– The spindle is enabled again and accelerated to the new speed.
©
Siemens AG 1991 All Rights Reserved 6ZB5 410-0HE02
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SINUMERIK 880 (PJ)