01.99 6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.1 General MD bits (general bits)
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7 6 5 4 3 2 1 0
Bit No.
NC MD
5051
Cycle
setting data
Default value: All 0
By setting the relevant NC MD bit, entries and modifications through the NC operator panel
can be prevented with the keyswitch.
Bit 0 Cycles setting data
Active: At once
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7 6 5 4 3 2 1 0
Bit No.
NC MD
5052
F62 pro-
gramming
(as from
SW 6.3)
Prog. Pre-
decod. with
G171/G172
Cylindrical
interpolation
with 4 axes
(as from
SW 6)
No
automat.
gener. of
G68 for rot.
axes
1)
Bit 7 Bit 7=0 F62 programming not active.
Bit 7=1 F62 programming active.
Default setting: 0
Active: MD immediately active
Bit 6 With this, the function "Progr. predecod. with G171/G172 is enabled (see
Section Functional Description).
Bit 1 Bit 1=0 Cylindrical interpolation with 2 axes
Bit 1=1 Cylindrical interpolation with 4 axes activated
Cylindrical interpolation can be activated for up to four axes, cylindrical interpolation remains
active. One limitation of this function is that the cylindrical interpolation axis must be
programmed as the 1st or 2nd axis in a block. The axes cannot therefore be programmed in
any order, nor can a circle be programmed without including the cylindrical interpolation axis. If
more than five axes are programmed in a block or if an axis other than the 1st or 2nd axis is
programmed as the cylindrical interpolation axis, alarm 2059 is output.
Default value: 0 for T and M controls
Bit 0 Bit 0=0 Automatic generation of G68 for initial programming of rotary axes.
Bit 0=1 No automatic generation of G68 for initial programming of rotary axes.
With this MD the user can define how the control is to behave on initial programming of the
axis by programming G68, G90 or G91. On a block search, the automatic generation of G68 is
retained because the user cannot influence by programming.
_______
1) As from SW 5
©
Siemens AG 1992 All Rights Reserved 6FC5197- AA50
6–109
SINUMERIK 840C (IA)
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