Siemens SINUMERIK 840C Installation Instructions Manual page 323

6 NC Machine Data (NC MD), NC Setting Data (NC SD)
6.6.3 Channel-specific MD bits 1 (channel bits)
NC MD
544*
Default value:
Active:
Bit 7-2 Bit 7-2=1
Bit 7-2=0
Bit 0
NC MD
546*
Default value:
Active:
Bit 7, 6, 5, 4, 3, 2
Bit 0
6–138
More user manuals on
7 6 5
Output of auxiliary functions in BCD
F H D
All 0
In the next block
The auxiliary function is output to the PLC in BCD. Bit 2 may not be set
to 1 because of the basic PLC program.
If the basic program M functions are to be decoded.
The auxiliary function is output to the PLC in hexadecimal (binary).
F value output to the PLC is deselected via machine data. This makes it
possible to improve the time required for block changes involving travel
blocks with F values, as it is not necessary to wait for an acknowledge-
ment from the PLC (e.g. 5D machining).
7 6 5
Aux. functions that are output immediately
instead of being collected during block search with calculation
F H D
All 0
At once
The auxiliary function types defined by these bits are not collected during a
block search with calculation, but are output immediately (may result in PLC
based triggering of several switching functions in succession).
When this bit is set, all auxiliary functions (M, S, T, D, H and F) encountered
during a block search with calculation are skipped and ignored (no output to
PLC and no internal reaction).
ManualsBase.com
Bit No.
4 3 2
T S M
Bit No.
4 3 2
T S M
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Siemens AG 1992 All Rights Reserved
09.95
1 0
No F value
output to
PLC
1 0
No aux.
function on
block
search
6FC5197- AA50
SINUMERIK 840C (IA)