Siemens HB 131. 10 B Service Manual Page 471

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Example
Note
- The only flag bytes that you can specify as IPC flags are the ones
enabled on the coordinator or on the CP(s).
- A flag byte that is defined on one or more CPUs as an IPC
input
flag byte must be defined as an IPC
output flag byte on one other
CPU or CP. An
IPC output flag byte is only allowed on one CPU,
but this may be used as an IPC input flag in all other CPUs in the
rack.
- If you have flag bytes that you have not defined as IPC flags in a
CPU, you can use them as normal flags!
You cannot use S flags as IPC flags!
CPU 1
IPC output flags:
FY 96 to FY 119
IPC input flags:
FY 120 to FY 125
CPU 2
Coordinator
IPC output flags:
FY 120 to FY 125
IPC input flags:
FY 96 to FY 119
Write
Read
Write
Read
Enabled area
per jumpers:
IPC flag bytes
FY 96 to FY 127
Fig. 10-1 Transferring IPC flags in the multiprocessor mode
Multiprocessor Mode
CPU 928B Programming Guide
10 - 6 C79000-B8576-C898-01
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