8 PLC Machine Data (PLC MD) 09.95
8.5 PLC MD for the operating system (system bits)
6030
DL 15 4321
PLC MD
DB63
DW No.
Bit No.
76543210
Error/operational messages
on inactive channels
1)
Default value: All bits default to 0
0 signal: Corresponding inactive channel DB is not used to activate error/operational
messages.
1 signal: The inactive channel DB is used to activate error/operational messages.
Example:
PLC MD 600000000011
Only the error bits in the active channel DBs (DB10, DB11) for channels 1 and 2 are
evaluated.
PLC MD 603000001100
The error bits in the inactive channel DBs (DB12, DB13) for channels 3 and 4 are also
evaluated.
Note:
If an error bit is set in an inactive channel DB that is used for the extended display of error and
operational messages, then the corresponding errors are not included in the message group
displays.
You are not permitted to assign PLC channels (MD 6000) while the display of error and
operational messages for unused channels (MD 6030) is active, as it would result in
corruption and falsification of the displays. Also refer to the PLC Installation Section.
Example: MD 6000.0 = 1 and
MD 6030.0 = 1
_______
1) No longer exists from SW 4 onwards, new alarm concept
8–16
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)