Siemens SIMATIC S5 Manual page 243

S5-115F Manual
Abb. Explanation
2
OB Organization block
PB Program block
(with block call and return operations)
PB/
Peripheral (input/output) byte
1
PY
PW Peripheral (input/output) word
Q Output
QB Output byte
QW Output word
RS System data area
- in the case of Load operations (supplementary
operations) and Transfer operations (system operations)
- in the case of Bit Test and Set/Reset operations (system
operations)
SB Sequence block
T Timer
- with the "Bit test" and "Set " supplementary operations
* FW 0 is reserved for the logical program counter
FW 2 to FW 198 (F 2.0 to F 199.7) permissible for the user porgram
FW 200 to FW 254 (F 200.0 to F 255.7) are only permissible in blocks as scratch flags. Scratch flags must be defined, set or reset at the
start of block execution as well as after conditional and unconditional block calls. This prevents data exchange with other blocks.
1 In the case of programmers with S5-DOS
2 See 2.3.1 for an overview of the organization blocks and their functions.
EWA 4NEB 811 6149-02
Permissible value range for operands for
CPU 942F
1 to 255
0 to 125
0 to 124
0 to 126
0 to 125.7
0 to 125
0 to 124 (digital)
128 to 254 (analog)
0 to 255
0.0 to 255.15
0 to 255
0 to 127
0.0 to 127.7
List of Operations
A-3