Activate input
State-controlled input for
activating the function block.
Data type: BOOL
Initial value: FALSE
Connection: With TRUE constant or TRUE/FALSE input
signal.
| Value | Description |
| TRUE | The function block is activated,
the inputs are evaluated, and the outputs switched accordingly.Refer to the hazard message and note below this
table. |
| FALSE | The
function block is not activated. The Done
output is switched to SAFEFALSE. |
Note
- In order to avoid error states of the FB, you should apply valid and correct values to the remaining inputs of the block before you activate it.
- If the CommandDelete input is already SAFETRUE when the function block is activated (Activate = TRUE) or when the Safety PLC is started up, the function block execution is started immediately.
|
Unintended start-up
- Be sure that your risk analysis includes an evaluation for the state change at the Done output after activating the safety-related function
block.
- Make certain that
appropriate procedures and measures (according to applicable sector standards)
have been established to help avoid hazardous situations when activating the
safety-related function block.
- Use appropriate safety interlocks where personnel and/or equipment
hazards exist.
|