Siemens SIMATIC IM 151/CPU Manual page 149

B.7 Logic Instructions with Parenthetical Expressions
Saving of the BR, RLO and OR bits and a function identifier (A, AN, ...) to the
nesting stack. 7 nesting levels are possible per block.
Ad-
Instruc-
dress
tion
ID
A( AND left parenthesis
AN( AND NOT left parenthesis
O( OR left parenthesis
ON( OR NOT left parenthesis
X( EXCLUSIVE OR left parenthesis
XN( EXCLUSIVE OR NOT left parenthesis
Status word for: A(, AN(, O(, ON(, X(,
XN(
Instruction depends on:
Instruction controls:
) Right parenthesis, removing an entry from
the nesting stack, gating the RLO with the
current RLO in the processor
Status word for: )
Instruction depends on:
Instruction controls:
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Description
BR A1 A0
Yes – –
– – –
BR A1 A0
– – –
Yes – –
Instruction List
Length
Typical Execution Time in
in
s
Words
1 1.7
1 1.7
1 1.7
1 1.7
1 1.7
1 1.7
OV OS OR STA
– – Yes –
– – 0 1
1 1.9
OV OS OR STA
– – – –
– – Yes 1
RLO /FC
Yes Yes
– 0
RLO /FC
Yes –
Yes 1
B-15