Technical data

6.20 OB 200 to OB 205: Multiprocessor Communication
These special function organization blocks are described in detail in
Chapter 10.
You can use the special function organization blocks OB 200 and
OB 202 to OB 205 to transfer data between CPUs in multiprocessor
operation using the coordinator 923C.
•• OB 200: initialize
This special function organization block sets up a memory area in
the 923C coordinator. This memory is a buffer for the data fields
that are transferred.
•• OB 202: send
This function transfers a data field to the buffer of the 923C
coordinator and indicates how many data fields can still be sent.
•• OB 203: send test
The special function OB 203 determines the number of free
memory fields in the buffer of the 923C coordinator.
•• OB 204: receive
This function transfers a data field from the buffer of the
923C coordinator and indicates how many data fields can still be
received.
•• OB 205: receive test
The special function OB 205 determines the number of occupied
memory fields in the buffer of the 923C coordinator.
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OB 200 to OB 205: Multiprocessor Communication
CPU 928B Programming Guide
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