Meaning Of Signals - Siemens SINUMERIK 840C Installation Instructions Manual

12.93
12.24.7.4

Meaning of signals

1. G220
1. G221
2. NFAFAKT
3. PLCOUT 96
4. QFAFAKT
5. FANSCHLAG
6. NFESTANER
7. Speed setpoint
8. PLCOUT 22
9. QFESTANER
10. Distance-to-go
11. Speed-controlled
operation
12. Block change
13. Current setpoint
14. Current setpoint DAC
15. VRED_FFA
16. S_FANSCHLAG
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
12.24.7 Diagrams for selection/deselection of travel to fixed stop
Deselection block for travel to fixed stop
Selection block for travel to fixed stop
Interface signal "Travel to fixed stop" active
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.
PLC acknowledgement for the interface signal "Travel to
fixed stop active"
Servo signal to VIL: "Fixed stop reached".
Interface signal "Fixed stop reached
PLC output for switchover to current-controlled operation.
This output is connected to term. 22 (611).
PLC acknowledgement for interface signal "Fixed stop
reached"
Initiation of deletion of distance-to-go
Separate position control loop and switch the axis
internally to follow-up mode (principle of operation as for
spindle mode).
A block change is initiated on termination of "Travel to
fixed stop" function.
Current setpoint transfer between VIL and servo
Current setpoint output via measuring circuit
The "Travel to fixed stop active" signal informs the servo
that "Travel to fixed stop" is active
Sensor signal "Fixed stop reached" from VIL: to servo
6FC5197- AA50
12 Functional Descriptions
12–255