Siemens SINUMERIK 840C Installation Instructions Manual page 276

07.97
NC MD
5004
Default value:
Bit 7 Bit 7=0 (Default) The DRF increment is equal to 1.
Bit 6
Bit 5
Bit 4 Bit 4=0 Feed override effective for rapid
Bit 3
Bit 1,0
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Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
More user manuals on
7 6
Var. Mode
increment group
for DRF spec. sin-
(as from gle block,
SW 6) type B
All 0
Bit 7=1 This activates the function "Variable increment for DRF offset". The value in
the "INC variable" setting data is activated as the DRF increment.
Active: Immediately
The first channel to process a block sets the remaining channels in the same
mode group to STOP. The axes that were halted are put into motion on the
next Start. The channel that initiated the Stop begins with the next block. Type
B single block.
Active: In the next block
The next NC Start is effective only when all channels in the same mode group
have processed their blocks and the axes are at a standstill. Type A single
block.
Active: In the next block
Bit 4=1 Own rapid override via DB 10-13 DR1 effective for rapid
Override is activated by selecting the appropriate softkey and FB 78 or
DB 10 ... 13 DR 1 bit 5
The PLC signal "NC START" (DB 10-17 DR2 bit 0) initiates a program start,
even if the reference points have not been approached, at least not for all
axes, i.e. the feed axes have not been synchronized with the machine position.
MD 560* bit 4 is irrelevant in this case. In order to ensure correct workpiece
machining, synchronization must be carried out in another form, such as
through use of the scratch method.
Active: NC Stop
The number of available handwheels is specified as follows:
Active: NC Stop
Bit
One handwheel
Two handwheels
ManualsBase.com
6 NC Machine Data (NC MD), NC Setting Data (NC SD)
Bit No.
5 4 3
Mode
Own rapid NC Start
group
traverse without
spec. sin-
override ref.point
gle block,
all axes
type A
1 0
0 1
1 1
6FC5197- AA50
6.6.1 General MD bits (general bits)
2 1 0
2nd 1st
handwheel available
6–91