Siemens CPU 948 - Page 475

OB 20
Restart OB to reserve
the buffer on the
923C coordinator
JU OB 200
BE
Cyclic user program
extended by the calls for
the RECV-DAT and SEND-DAT
function blocks.
OB 1
C
JU
DB xxx
FB 101
C
JU
DB xxx
FB 100
BE
FB 100
FB 101
Function block: SEND-DAT
Send data blocks
Function block: RECV-DAT
Receive data blocks
Data block containing
the link list
Maximum three input and
three output blocks
DB xxx
BE
BE
KS = S1
KY = 1,...
evalu-
ated
by ...
DB yyy
or/and
DX zzz
.
.
.
.
.
.
.
.
.
.
.
.
OB 200 must
only be called
in one processor.
1)
1)
Fig. 10-6 Overview of the blocks required in each CPU
Applications
CPU 948 Programming Guide
C79000-G8576-C848-04
10 - 71