Siemens CPU 948 Programming Manual page 152

Semaphore Operations
Semaphore application example continued:
FB 100
NAME :SEMADIS
:SED 10
:JZ =M001
:AN F 10.1
:S F 10.1
M001 :BE
FB 110
NAME: MSGOUT
:L FW12
:T OW 6
:AN F 10.3
:S F 10.3
:
:BE
FB 101
NAME :SEMAENAB
:SEE 10
:JZ =M001
:AN F 10.4
:S F 10.4
:
M001 :BE
3 - 80
Disable semaphore no. 10
If the semaphore is disabled successfully,
set "SEMAPHORE-DISABLED" flag.
Transmit a message
to the peripherals
Set "TRANSFER MESSAGE"
flag
Enable semaphore no. 10
Set "SEMAPHORE ENABLED"
flag
CPU 948 Programming Guide
C79000-G8576-C848-04