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PG Functions via the S5 Bus
PG
End point
of path
Fig. 11-12
Paths between the PG and CPU 948 and assignment of the CP 143 pages
Special features when
communicating via pages for
user HDBs
11 - 34
1st CP 143
SSNR
Page for
232
user
HDB
SSNR
Page for
233
user
HDB
SSNR
Page for
234
PG
functions
SSNR
Page for
235
PG
functions
2nd CP 143
SSNR
Page for
236
user
1)
HDB
SSNR
Page for
237
user
1)
HDB
SSNR
238
Page for
PG
functions
SSNR
Page for
239
PG
functions
1)
Communication via user HDB with
CPU 3 and CPU 4 is not possible.
By synchronizing the CP 143 for communication (FB 125 called with
SSNR 232, 233 or 236, 237) the existing connections are terminated
by the CP 143
The paths must then be re-established. Waiting times then occur on
the PG (even if you press the abort key). The path selection must be
repeated on the PG.
Owing to this response, you cannot use the PG function "status
block" via the S5 bus for the start-up OBs if you use pages for user
HDBs for communication. You should therefore call FB 125 (HDB
SYNCHRON) only in a COLD RESTART or in a restart following
POWER UP (COLD RESTART or WARM RESTART).
CPU 1
CPU 948
CPU 2
CPU 948
CPU 3
CPU 948
CPU 4
CPU 948
CPU 948 Programming Guide
C79000-G8576-C848-04
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