09.95 8 PLC Machine Data (PLC MD)
8.5 PLC MD for the operating system (system bits)
6026DL 13
Enable
serial
interface
DB37
Enable init
in same
channel
Deselect
autom. NC
START
INHIBIT
with MDA
Save flag
area
Access to
PLC data
inhibited
with @
Command
channel
enabled
PLC MD
DB63
DW No.
Bit No.
76543210
Default value: 1000 000
Bit 7 When bit 7 is set, data can be read in and out via the computer link
interface with DB 37.
Bit 6 = 1: Funktion Init im eigenen Kanal wird freigegeben.
Bit 5 = 1: NC start is issued to all channels (even if ”NC start inhibit” is active).
It is up to the passed to make sure that NC start is not passed to the NC
(DB 10-13, D 20).
Bit 3 = 0: Save flags 224 - 255 (default setting) when changing processing level
Bit 3 = 1: Save flags 200 - 255 when changing processing level
Bit 5 = 0: On MDA mode, NC start is only passed to the selected channel. NC start
is not passed to those channels signalling ”NC start inhibit”
(DBs 10-13, D 16-15).
Note:
The MD is not active when using the ”Overstore” function. With ”Overstore”, NC start is
always prevented from becoming active in a non-selected channel.
Bit 2 Access to PLC data over @ commands is disabled.
Bit 1 The command channel function is enabled. The number of user interfaces
is specified in PLC MD 33. See PLC MD 33.
6029DR 14
Signal T/H
word routing
target
channel
suppressed
T/H
word
routing
active
PLC MD
DB63
DW No.
Bit No.
76543210
Default value: 0
Bit 0 Bit = 0 T and H words are output to the programmed channel DB only. Also see
the Interface Description.
Bit = 1 T/H words can be routed to different channel DBs over the extended T/H
address.
Bit 3 As long as interface signal DB 10 to 13, DR 63.6 is set to "1", machine data bit
6029.3 has the following effect:
Bit = 0 The signal "Route T/H word" from the source channel to the programmed
target channel is suppressed.
Bit = 1 The signal "T/H word routing" is suppressed in the target channel.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
8–15
SINUMERIK 840C (IA)