09.95
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50
9–2
SINUMERIK 840C (IA)
Internal The following conditions must be fulfilled before the traversing motion can be
started:
SNC operating mode “JOG”
SNo traversing command for axis/spindle
SNo follow-up mode (for axes)
SNo parking
SNo axis/spindle disable
SNo alarms
SNo EMERGENCY STOP
SNo warm restart
SChannel in reset
SController enabling command
SDrive enabling commands
SFeed/spindle enabling command
SNo HW limit switch (for axes)
SFeed override 0 (for axes)
SNo PLC spindle control
SNo violation of working area limits (for axes)
The traversing motion is initiated through actuation of the NC start hardkey.
PLC Axes with a mechanical brake also require a brake activation function. Select the
“PLC” enables for this purpose. In this enable mode, the PLC signal “Motion en-
able drive test” acts in addition to the traverse enabling commands listed above.
The traversing motion is likewise initiated through actuation of the NC start hard-
key.
Use the request signal “Traverse request drive test” which is generated with
selection of the measuring function in the PLC user program and the
acknowledgement signal “Motion enable drive test” (see Interface Description –
DB29 and DB31).
SOn “Traverse request drive test”, switch on the control and enable the brake.
SAcknowledge the enabling of the control and brake with “Motion enable drive
test”, following expiry of a delay timer if appropriate.
SThe measuring function can only start when this sequence is complete.
SOn completion of the measurements – when “Traverse request drive test”
disappears, disable the brake and control again.
PLC without NC In this enable mode, a positive edge of the PLC signal “Motion enable drive test”
(as from SW 4) is required to start the traversing motion.
NC start is not necessary. In this mode, the number of internal enable monitoring
functions is reduced to axial signals
SController enable
SFollow-up
SParking
SPulse enable
SMotion enable drive test
and to the general signals
SKey reset
SNCK mode switchover
SEMERGENCY STOP
SWarm restart.
9 Drive Servo Start-Up Application (as from SW 3) 10.94