Siemens SIMATIC S5-100U System Manual page 504

Operations List, Machine Code and List of Abbreviabrations
Abbreviation
RLO Result of logic operation
RLO affected? The RLO is affected/not affected
Y/N by the operation.
RLO
dependent? The statement is executed only if the RLO is "1".
Y The statement is executed only on
Y Y positive/negative edge change of the RLO.
/
N The statement is always executed.
RLO reloaded? When the next binary operation takes place, the
Y/N RLO is reloaded/not reloaded (e.g. A I 0.0).
RS System data area
- for load operations (supplementary operations)
and transfer operations (system operations)
- for bit test and set operations (system
operations)
SAC STEP address counter
SAV DB1 parameter: Clock time after last switch from
STOP RUN or save from last Power OFF
SB Sequence block
SDP DB1 block ID for system data parameters
SET DB1 parameter: Set clock/date
SF DB1 parameter: SINEC L1, position of send
mailbox
SL1 DB1 block ID for SINEC L1
SLN DB1 parameter: SINEC L1, slave number
STL STEP 5 statement list method of representation
STP DB1 parameter: update the clock while in the
STOP state.
STW DB1 parameter: status word location (integral
real-time clock)
T Timer
- for the "Bit Test" and "Set" supplementary
operations
TFB DB1 block ID for timer function block
TIS DB1 parameter: set prompt time
WD DB1 parameter: set scan time monitoring
* +integrated FBs such as CPU 103
A-20
Explanation
Permissible Operand Value Range for
CPU 100 CPU 102
(0 to 15) (0 to 31)
EWA 4NEB 812 6120-02b
S5-100U
CPU 103
(0 to 255)
(0.0 to 255.15)
(0 to 255)
(0 to 127)
(0.0 to 127.15)