Siemens SIMATIC S5-115U, User Manual, Page: 186 / 676

Introduction to STEP 5 S5-115U Manual
Table 7-4. Block Parameter Types and Data Types with Permissible Actual Operands
Parameter
Type
Data Type Permissible Actual Operands
I, Q BI for an operand with bit address
BY for an operand with byte address
W for an operand with word address
I x.y inputs
Q x.y outputs
F x.y flags
IB x input bytes
QB x output bytes
FB x flag bytes
DL x data bytes left
DR x data bytes right
PB x peripheral bytes
IW x input words
QW x output words
FW x flag words
DW x data words
PW x peripheral words
D KM for a binary pattern (16 digits)
KY for two absolute numbers, one byte
each, each in the range from 0 to 255
KH for a hexadecimal pattern (maximum 4
digits)
KS for a character (maximum 2
alphanumeric characters)
KT for a time (BCD-coded time) with time
base 0.0 to 999.3
KC for a count (BCD-coded)
0 to 999
KF for a fixed-point number in the range
from - 32768 to +32767
Constants
B Type designation not permitted DB x Data blocks. The C DBx operation is
executed.
FB x Function blocks (permissible without
parameters only) are called
unconditionally (JU..x).
PB x Program blocks are called
unconditionally (JU..x).
SB x Sequence blocks are called
unconditionally (JU..x).
OB x Organization blocks are called
unconditionally (SPA..x).
T Type designation not permitted T Timer. The time should be assigned
parameters as data or be
programmed as a constant in the
function block.
C Counter. The count should be
assigned parameters as data or be
programmed as a constant in the
function block. Type designation not permitted C
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Calling a Function Block
Function blocks are stored like other blocks under a specific number (e.g. FB47) in internal pro-
gram memory. Numbers 240 to 251 are reserved for integral FBs and can therefore not be used for
user-written FBs! Numbers 238 to 239 are also reserved for integral FBs; however, these FBs can be
renumbered (see Chapter 11).
FB calls can be programmed in all blocks except data blocks.
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EWA 4NEB 811 6130-02b