Siemens SINUMERIK 840D sl Function Manual page 1248

Detailed description
2.12 Block descriptions
The
MCS/WCS switchover with edge evaluation, axis selections, direction keys and rapid
traverse overlay are determined in Network Global_in for further processing in the block. The
user-specific changes must take place in this part of the program, will usually involve axis
selection.
Only the keyswitch information is copied in Network NC.
The mode group network
transfers the modes of the keys as dynamic signals to the NCK.
If the mode group number is 0, this network is not processed. A too large BAG number
produces a message 401901 or 402501 and is switched after stop.
In the Channel network
the NC Start, Stop, Reset and Single Block functions are activated by corresponding
checkback signals. The direction keys of the geometry axes are supplied if a corresponding
preselection is made, otherwise they are cleared. If the channel number is 0, this network is
not processed. A too large BAG number produces a message 401902 or 402502 and is
switched after stop.
The spindle network
transfers the spindle override into the interface configured via SpindleIFNo.
The axis network
transfers the feedrate override to the selected axis interface. The direction keys are assigned
to the selected axis/spindle. If an axis has been selected previously, the direction information
is set to 0. The INC checkback of the selected axis is displayed.
The output parameters are prepared and the LED signals of the INC machine function are
generated in the
global_out network.
The output network
transfers the output signals of the machine control panel from the VAR_TEMP image to the
logical address. The data for the next cycle are also saved.
Axis selection extension
Network Global_in
must be modified for more than 9 axes. If other keys and LEDs are to be used on the
machine control panel here, proceed as follows:
1. The UD DW#16#Wert command deletes all LEDs defined for axis selections.
2. The UW W#16# command, with the comment "Mask all axis selection keys" checks for a
3. The branch destination list (SPL) must be expanded with new jump labels.
264
The bit mask is currently processing the 9 axis selection LED.
new selection of direction. The bit string must be adjusted here.
The new jump labels should be inserted in descending order before label m009. The
selection information should be extended for the new jump labels, as described for labels
m009 and m008.
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0