Siemens SIMATIC S5-100U, System Manual

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Operations List, Machine Code and List of Abbreviabrations S5-100U
A-18
EWA 4NEB 812 6120-02b
A.3 List of Abbreviations
Abbreviation Explanation
Permissible Operand Value Range for
CPU 100 CPU 102 CPU 103
ACCU 1 Accumulator 1 (When accumulator 1 is loaded,
any existing contents are shifted
into accumulator 2.)
ACCU 2
Accumulator 2
BF Byte constant (fixed-point number) (- 127 to +127) (- 127 to +127) (- 127 to +127)
C Counter
- retentive
- non-retentive
- for the “Bit Test” and “Set” supplementary
operations
(0 to 7)
(8 to 15)
(0 to 15)
(0 to 7)
(8 to 127)
(0 to 127)
(0 to 7)
(8 to 127)
(0 to 127)
(0.0 to 127.15)
CC 0/CC 1 Condition code 0/Condition code 1
CF DB1 parameter: input correction factor (integral
real-time clock)
CLK DB1 parameter: clock data location
CPU Central processing unit of programmable
controller
CSF STEP 5 control system flowchart method of
representation
D Data (1 bit) (0.0 to 255.15)
DB Data block (2 to 63) (2 to 63) (2 to 255)
DL Data word (left-hand byte) (0 to 255) (0 to 255) (0 to 255)
DR Data word (right-hand byte) (0 to 255) (0 to 255) (0 to 255)
DW Data word (0 to 255) (0 to 255) (0 to 255)
EF DB1 parameter: SINEC L1, position of receive
mailbox
F Flag - retentive
- non-retentive (0.0 to 63.7)
(64.0 to 127.7)
(0.0 to 63.7)
(64.0 to 127.7)
(0.0 to 63.7)
(64.0 to 255.7)
FB Function block (0 to 63) (0 to 63*) (0 to 255)
FB/FY Flag byte - retentive
- non-retentive (0 to 63)
(64 to 127)
(0 to 63)
(64 to 127)
(0 to 63)
(64 to 255)
Formal
operand Expression with a maximum of 4 characters. The
first character must be a letter of the alphabet.
FW Flag word - retentive
- non-retentive (0 to 62)
(64 to 126)
(0 to 62)
(64 to 126)
(0 to 62)
(64 to 254)
I Input (0.0 to 127.7) (0.0 to 127.7) (0.0 to 127.7)
IB Input byte (0 to 127) (0 to 127) (0 to 127)
IW Input word (0 to 126) (0 to 126) (0 to 126)
KB Constant (1 byte) (0 to 255) (0 to 255) (0 to 255)
* +integrated FBs such as CPU 103