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12.93 12 Functional Descriptions
12.18.12 Programming
• The defined gearbox configuration is maintained in the following events:
– End of block
– End of program
– Change of operating mode
– Warm start
– Power off
• Reconfiguration of the GI grouping can be prevented by appropriately setting NC MD
1844*/525*.
• The link between a leading spindle/C-axis and a following drive can be defined in the
configuration via the leading spindle name or by means of the C-axis name. The link is
maintained even during the leading drive change "spindle -> C-axis -> spindle". The
actual value information for the gearbox interpolation is always, however, supplied by the
encoder of the defined leading drive (spindle encoder or C-axis encoder).
Switching the link on and off
• The LINK ON/OFF command can be issued via the NC part program and the input display
either selectively for individual leading drives or for the entire GI grouping.
• A LINK ON/OFF command can be issued from the PLC, but only for the entire GI
grouping. The gearbox link can therefore be selected or deselected from the PLC
depending on certain operating states.
• In order to select LINK ON/LINK OFF for gearbox interpolations from two gearbox
configurations, two NC program blocks in each case must be written.
• After G400, G402 and G403 have been programmed, block changes can be delayed or
stopped on the basis of the following three signals:
– INTERLOCK LINK ON
– INTERLOCK LINK OFF
– SYNCHRONISM FINE in conjunction with NC MD 1848*/526* bit 2
– SYNCHRONIZATION REACHED with NC MD 1848*/526* bit 5.
• When LINK ON (G402, G403) is programmed, the block change is inhibited as long as the
interface signal INTERLOCK LINK ON is present. The signal REQUEST LINK ON is set.
• If the signal INTERLOCK LINK ON is set when LINK ON is selected, the link request is not
cancelled. However, it does not become operative until the signal INTERLOCK LINK ON is
reset.
• When LINK OFF is programmed, the block change is inhibited as long as the interface
signal INTERLOCK LINK OFF is present. The signal REQUEST LINK OFF is set.
• If the signal INTERLOCK LINK OFF is set when LINK OFF is selected, the deactivation
request is not cancelled. However, the link is not deactivated until the signal INTERLOCK
LINK OFF is reset.
• In the LINK ON state (G402, G403), block changes can be inhibited via NC MD
1848*/526* bit 2 until the interface signal SYNCHRONISM FINE is present.
• While the signal PLC SPINDLE CONTROL is set, block changes are disabled after
selection of synchronous operation.
• In "On-the-fly synchronization" mode (G403), block changes can be inhibited via NC MD
1848*/526* bit 5 until the interface signal SYNCHRONIZATION REACHED is present.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 12–151
SINUMERIK 840C (IA)
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