Siemens SINUMERIK 840D sl Function Manual page 616

K1: Mode group, channel, program operation, reset response
9.16 System settings for power-up, RESET / part program end and part program start
Program code
IF $P_PROG_EVENT == 4
IF $P_TRAFO <> 0
WAITENC
TOROTZ
ENDIF
M17
ENDIF
IF $P_PROG_EVENT == 1
TOROTOF
RET
ENDIF
The WAITENC command essentially corresponds to the following program sequence (example
for 5-axis machine with AB kinematics):
Program code
WHILE TRUE
IF (($AA_ENC_ACTIVE[X]==TRUE) AND ($AA_ENC_ACTIVE[Y]==TRUE) AND ($AA_ENC_ACTIVE[Z]==TRUE) AND
($AA_ENC_ACTIVE[A]==TRUE) AND ($AA_ENC_ACTIVE[B]==TRUE)) GOTOF GET_LABEL
ENDIF
G4 F0.5
ENDWHILE
:Position synchronization
GET_LABEL: GET(X,Y,Z,A,B,)
Continuing machining
AUTOMATIC mode
For automatic execution of programs in the AUTOMATIC mode, all the machine axes, whose
actual position of the active measuring system has been restored, must be referenced.
MDI mode and overstore
In the MDI mode and for the overstore function, machining can also be performed, without
referencing the axes, with restored positions. To do this, NC start with restored positions must
be enabled explicitly for a specific channel:
MD20700 $MC_REFP_NC_START_LOCK = 2
Supplementary condition
Axes with incremental encoders and without actual value buffering
It is to be assumed that axes with incremental encoders and without actual value buffering are
clamped with sufficient speed in the event of a power failure to prevent them drifting from their
last position setpoint.
616
Comment
; Run-up
; Transformation has been selected.
; Wait for valid axis positions of the orientation axes.
; Rotate the Z axis of the WCS towards the tool axis.
; Start of the part program.
; Reset the tool frame.
Comment
; Wait for a measuring system.
; 0.5 s wait time
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions