Axis-Specific Md Bits 1 (Axial Bits 1) - Siemens SINUMERIK 840C Installation Instructions Manual

6 NC Machine Data (NC MD), NC Setting Data (NC SD)

6.6.4 Axis-specific MD bits 1 (axial bits 1)

6.6.4 Axis-specific MD bits 1 (axial bits 1)
NC MD 7
Act.-value Automatic
display direction
560*
modulo 360 recog. on
deg. referencing
Default value: MD 5600-5629
Bit 7 For rotary axes (NC MD 564*, bits 5-1)! Acts on linear axes as well.
The actual-value display jumps from 359.999 to 0 degrees after one
revolution of the rotary axis.
Rotary axes, see also Section Functional Descriptions.
Active On:
Bit 6 Bit 6 =1 The NC can detect precisely the direction in which the reference point
lies from the "Deceleration" interface signal, as the reference point
extends up to the traversing limit (also see Section Axis (Analog) and
Spindle Installation).
Active On:
Bit 6 = 0 If the axis is between the reference point cam and EMERGENCY STOP
when the control is powered up, the axis moves to EMERGENCY STOP
during reference point approach, as the control cannot detect from the
"Deceleration" interface signal whether the axis is ahead of or behind
the reference point cam (also see Section Axis (Analog) and Spindle
Installation).
Bit 5 Bit 5 = 0 The software limit switches defined in NC MD 224* to 236* are overrun
without a reaction of any kind. The working field limitation (setting data)
is not in force.
Active On:
6–144
Bit No.
6 5 4
Software NC start
limit although
switches ref. pt. not
active reached
0010 0000
RESET
NC STOP
Ref. point
RESET
©
Siemens AG 1992 All Rights Reserved
3 2
Dyn. SW
Rounding Rounding to limit switch
for rotary whole/half for
axes degrees following
axes
Reference point cam
Traversing limit
Operating point
SINUMERIK 840C (IA)
08.96
1 0
Servo loop
monitor not
active
6FC5197- AA50