SEMA block
Short summary
Name |
|
→POU type |
|
Category |
|
Conform to →IEC-standard |
not defined in IEC-standard |
Graphical interface |
|
Available since |
version 1.27.0 (for Neuron Power Engineer) |
Functionality
The block represents a semaphore.
If input CLAIM
is →turned on, output BUSY
returns value TRUE
(or an equivalent) starting with the next executed cycle. If input RELEASE
is turned on, output BUSY
returns value FALSE
(or an equivalent).
In-/outputs
|
Identifier |
Description |
|
---|---|---|---|
Inputs: |
|
|
set (dominant) |
|
|
reset |
|
Outputs: |
|
|
|
Input EN
and output ENO
are available when →calling the block. See "Execution control: EN, ENO" for information on input EN
and output ENO
.
See:
-
"Blocks for safe logic" whether this block is supported for developing safety-relevant applications.
-
"Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic.
Example for usage within ST-editor
|
When creating your application within the ST-editor, enter a call of a block by typing the text as requested by the syntax or use Content Assist.