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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.
10–34
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)
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