Siemens SINUMERIK 840C Installation Instructions Manual page 272

08.96
NC MD 7 6
Working
No de-
area
celeration
limitation
5003
at limit
in force in
switch
JOG mode
Default value: 0000 0100
Bit 7 No deceleration on reaching the software limit switch. When this bit is set, braking
does not follow the acceleration/deceleration curve; only the following error is
suppressed. The limit switch is not overrun to any great extent (also see NC MD
1100*).
Active:
Note
In the case of interpolating axes, all axes are stopped when the range limit of an
axis is reached. Stopping without a contour violation, however, is guaranteed only
when bit 7 of MD 5003 is not set (no deceleration at limit switch), i.e. deceleration
takes place over the acceleration ramp.
V
Bit 7=0
Bit 6 The working area limitation is also effective in JOG mode. In addition to the
software limit switches, the working area can therefore be limited in JOG mode,
thereby better safeguarding the machine against unintentional travel. However,
since a working area limitation is a software limitation, proper operation can only be
ensured following reference point approach.
Active:
©
Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
Bit No.
5 4
Polar
Interpol.
coord.
params
angle de-
dependent
pendent
on
on
G91/G90
G91/G90
NC Stop
t
Speed specified by interpolator
Actual axis speed
NC Stop
6FC5197- AA50
6.6.1 General MD bits (general bits)
3 2 1
Do not clear Auxiliary Internal
WAIT mark
PRESET function
synchroni-
OFFSET on output
zation (as
POWER before
from SW
ON travel
5.6)
V
Bit 7=1
0
No NC
STOP in
dwell block
G04S.../G1
4/G24 (as
from SW
5.4)
t
6–87