Siemens SINUMERIK 840C - Manual (Page 724)

10 Axis and Spindle Installation 06.93
10.4.3 Axis traversing
In the absence of feed enable and servo enable signals, an indication showing that the axis is
not in position (" > ") is screened when the direction key is pressed. The following signals
must not be present if the axis is to traverse at the specified speed (with consideration given
to the feedrate/rapid traverse override switch):
• External F (feedrate from PLC)
• Feedrate reduction ratio 1:100
• Testing of all jog mode functions:
–
Limit switches
– External deceleration (reference point cam)
– Feedrate override
– Incremental feed mode
– Reference point approach
10.4.3.2 Program-controlled traversing
Only the main function should be tested to enable the use of programs as optimization aid.
The following data and signals can prevent program-controlled traversing:
• Read-in inhibited (DL 7 to DR 10)
• NC START = 1 / NC STOP = 0 (DR 2)
• NC START inhibited (DW 11)
• NC MD 106*
• Reference point not approached or bit 3 set in NC MD 5004
• NC MD 548*, 550*, 552*
• NC START ineffective (DL 16)
• Feed disable all
Check to see if axis traversing is possible via program memory.
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SINUMERIK 840C (IA)