- (neg)
Operator - Performs an integer negation of the input.
Inputs
|
Input |
Data type |
Description |
|
IN |
DINT |
Integer value. |
Outputs
|
Output |
Data type |
Description |
|
Q |
DINT |
Integer negation of the input. |
Truth table (examples)
|
IN |
Q |
|
0 |
0 |
|
1 |
-1 |
|
-123 |
123 |
Remarks
In FBD and LD language, the block NEG can be used. In LD language, the operation is executed only if the input rung (EN) is TRUE. The output rung (ENO) keeps the same value as the input rung. In ST language, "-" can be followed by a complex boolean expression between parenthesis.
ST Language
Q := -IN;
Q := - (IN1 + IN2);
FBD Language
LD Language
The negation is executed only if EN is TRUE.
ENO keeps the same value as EN.
- (neg) |
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IEC 61131-3 Automation platform > Programming - Reference guide > Arithmetic operations > - (neg) |
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