STEP 5 Operations
S5-115U Manual
8.1.1
Boolean Logic Operations
Table 8-1 provides an overview of boolean logic operations. Examples follow the table.
Table 8-1. Overview of Boolean Logic Operations
1
If the scan follows an RLO limiting operation directly (first scan), the scan result is reloaded as a new RLO.
Operation
Meaning
Scan operand for "1" and combine with RLO through logic AND.
The result is "1" when the operand in question carries signal state
"1". Otherwise the scan results in "0". Combine this result with the
RLO in the processor through logic AND.
1
Operand
A
O
Scan operand for "1" and combine with RLO through logic OR.
The result is "1" when the operand in question has signal state "1".
Otherwise the scan results in "0". Combine this result with the RLO
in the processor through logic OR.
1
Scan operand for "0" and combine with RLO through logic AND.
The result is "1" when the operand in question has signal state "0".
Otherwise the scan results in "0". Combine this result with the RLO
in the processor through logic AND.
1
Scan operand for "0" and combine with RLO through logic OR.
The result is "1" when the operand in question has signal state "0".
Otherwise the scan results in "0". Combine this result with the RLO
in the processor through logic OR.
1
AN
ON
Parameter
CPU 941/942/943/944
0.0
to
127.7
0.0
to
127.7
0.0
to
255.7
0
to
127
0
to
127
ID
I
Q
F
T
C
O
Combine AND operations through logic OR.
Combine the result of the next AND logic operation (RLO) with the
previous RLO through logic OR.
A(
Combine expression enclosed in parentheses through logic AND.
Combine the RLO of the expression enclosed in parentheses with
the previous RLO through logic AND.
O(
Combine expression enclosed in parentheses through logic OR.
Combine the RLO of the expression enclosed in parentheses with
the previous RLO through logic OR.
)
Close parenthesis.
Conclude the expression enclosed in parentheses.
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8-2
EWA 4NEB 811 6130-02b
Содержание SIMATIC S5-115U
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