Computer Drive Installation Instructions

12.93 12 Functional Descriptions

12.24.7 Diagrams for selection/deselection of travel to fixed stop

12.24.7.4 Meaning of signals

1. G220 Deselection block for travel to fixed stop

1. G221 Selection block for travel to fixed stop

2. NFAFAKT Interface signal "Travel to fixed stop" active

3. PLCOUT 96 PLC output which is connected to term. 96 (611 FD) or

gear stage changeover (611 MSD, 660). The MSD have

1-3 terminals available for gear stage changeover.

4. QFAFAKT PLC acknowledgement for the interface signal "Travel to

fixed stop active"

5. FANSCHLAG Servo signal to VIL: "Fixed stop reached".

6. NFESTANER Interface signal "Fixed stop reached

7. Speed setpoint

8. PLCOUT 22 PLC output for switchover to current-controlled operation.

This output is connected to term. 22 (611).

9. QFESTANER PLC acknowledgement for interface signal "Fixed stop

reached"

10. Distance-to-go Initiation of deletion of distance-to-go

11. Speed-controlled

operation Separate position control loop and switch the axis

internally to follow-up mode (principle of operation as for

spindle mode).

12. Block change A block change is initiated on termination of "Travel to

fixed stop" function.

13. Current setpoint Current setpoint transfer between VIL and servo

14. Current setpoint DAC Current setpoint output via measuring circuit

15. VRED_FFA The "Travel to fixed stop active" signal informs the servo

that "Travel to fixed stop" is active

16. S_FANSCHLAG Sensor signal "Fixed stop reached" from VIL: to servo

12–255

SINUMERIK 840C (IA)