Start-Up
SINUMERIK 802S base line
4-21
Start-Up
4.3.6 Instruction set
A detailed description of the instructions is to be found in the help system of the
PLC 802 Programming Tool (Help > Contents and Index, “SIMATIC LAD
Instructions”) and in the Documentation “S7-200 Automation System, CPU22x
System Manual.
Table 4–11 Instruction set
BASIC BOOLEAN INSTRUCTIONS
Instruction Ladder Symbol Valid Operands
Load
And
Or
normal open
n=1 close
n=0 open
Bit
V, I, Q, M, SM, T, C, L
Load Not
And Not
Or Not
normal close
n=0 close
n=1 open
Bit
V, I, Q, M, SM, T, C, L
Output prior 0, n=0
prior 1, n=1
Bit
V, I, Q, M,T, C, L
Set
(1 Bit)
prior 0, not set
prior 1 or
↑
Bit
S
V, I, Q, M, T, C, L
Reset
(1 Bit)
prior 0, no reset
prior 1 or
↑
Bit
R
V, I, Q, M, T, C, L
OTHER BOOLEAN INSTRUCTIONS
Instruction Ladder Symbol Valid Operands
Edge Up
prior
↑
close
(1 PLC cycle)
P
Edge Down
prior
↓
close
(1 PLC cycle)
N
Logical Not prior 0, later 1
prior 1, later 0
OPU
No operation
n
NOP
n = 0 ... 255
BYTE COMPARES (Unsigned)
Instruction Ladder Symbol Valid Operands
Load Byte =
And Byte =
Or Byte =
a = b close
a ≠ b open
a
b
==B
Load Byte
And Byte
Or Byte
a
EFORVH
a < b open
a
b
> =B
Load Byte
And Byte
Or Byte
a
EFORVH
a > b open
a
b
< =B
a: VB, IB, QB, MB,
SMB, AC, Constant,
LB
b: VB, IB, QB, MB,
SMB, AC, Constant,
LB
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