Siemens SIMATIC S5 Manual page 241

S5-115F Manual
A List of Operations
A.1 Explanatory Notes on the Operands
Abbreviations Explanation
ACCUM 1 Accumulator 1 (during the loading of accumulator 1 any existing contents are shifted into accumulator 2).
ACCUM 2 Accumulator 2
CC 0 / CC 1 Condition code 0 / Condition code 1
CSF Control system flowchart method of representation in STEP 5.
Formal operand Expression of up to 4 characters. The first character must be a letter.
LAD Ladder diagram method of representation in STEP 5.
OV Overflow. This condition code bit is set if, for example, the numerical range is exceeded during arithmethic
operations.
PII Process input image
PIQ Process output image
RLO Result of logic operation
RLO-dependent Y The statement is executed only if RLO = "1".
Y The statement is executed only on the leading ( ) or trailing ( ) edge of the RLO.
/ The statement is always executed.
N
RLO affected? The RLO is
Y / N affected / not affected by the operation.
RLO reloaded? The RLO is
Y / N reloaded / not reloaded with the signal state of the parameter used when the next logic operation (but not
assignment) is performed.
STL Statement list method of representation in STEP 5.
EWA 4NEB 811 6149-02
List of Operations
A-1