Siemens CPU 948 Programming Manual page 144

Executive Operations
I/O operations
Table 3-26 I/O operations
Operation Operand
IA
RA
IAE
RAE
BAS
BAF
Other operations
Table 3-27 Other operations
Operation Operand
S STS
STW
SIM
LIM
3 - 72
Function
Disable process interrupt servicing (via IB 0) (not for system
interrupts!)
Enable process interrupt servicing (via IB 0) (not for system
interrupts!)
Disable addressing error
Enable addressing error
Disable command output: PIQ is no longer influenced by the
operations
S Q, R Q, = Q, T PY and T PW.
Enable command output
"Enable/disable process interrupts" can, for example, be used when
process interrupt driven processing is to be suppressed during
time-controlled processing. In the program section between the IA and
RA statements, no process interrupt driven processing is possible.
Note the special function OB 122 "disable interrupts", Section 6.3.
Function
Stop command leading directly to a soft STOP.
Stop command leading directly to a hard STOP.
(state can only be exited with POWER DOWN/UP).
Set interrupt mask (UAMW) (32 bits): before calling the
operation, the bit pattern for the mask must be loaded in ACCU 1
(32 bits)
Read interrupt mask: bit pattern of the interrupt mask (32 bits) is
loaded in ACCU 1
CPU 948 Programming Guide
C79000-G8576-C848-04