Siemens SINUMERIK 840C - Manual (Page 331)

6 NC Machine Data (NC MD), NC Setting Data (NC SD) 08.96
6.6.4 Axis-specific MD bits 1 (axial bits 1)
7 6 5 4 3 2 1 0
Bit No.
NC MD
564* Axis exists Axis type Rotary axis
Division
axis
Actual
values
division-
related
Actual
value sign
change
Setpoint
sign change
Ref. point
appr. in
neg.
direction
Default value
MD T M
5640 1000 0010 1000 0010
5641 1000 0010 1000 0010
5642 0 1000 0010
5643 0 0
5644
.
.
.
5669
0
.
.
.
0
0
.
.
.
0
840T: Bit 7 in MD 5640 and 5641 must be "1".
840M: Bit 7 in MD 5640, 5641 and 5642 must be "1".
Bit 7 When this bit is set, the axis is displayed on the monitor screen and the
position controller and measuring circuit monitor are activated. PLC MD 6016
and 6017 must be observed as regards the interface.
If this bit is set the axis can be used as an auxiliary axis. Interpolation is then
not permissible.
Active On:
POWER ON
Bit 6 Fictitious axes are required for coordinate transformation (see NC MD 5060
to 5069). Fictitious axes have no position controller (NC MD 200* irrelevant)
and require no measuring circuit. Fictitious axes must be linear axes.
Active On:
POWER ON
Note:
SW4: With a fictitious axis, only 14 real axes are possible. With reference to MD 2000.
Bit 5 The axis is declared as rotary axis. Position control thus begins in degrees,
and G70/G71 is disabled for rotary axis programming. For further details on
rotary axes, also see Section entitled ”Functional Descriptions”.
Active On:
NC STOP
Bit 4 Bit 4 ("Division axis") declares a linear or rotary axis to be a division axis,
and thus activates NC MD 1104*, 1108*, 1112* and 564* bit 3. See Section
entitled ”Functional Descriptions”.
Active:
At once
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SINUMERIK 840C (IA)