This function generates pulses at a given frequency. The pulse is always present for one (control) cycle.
| LGF_Impulse (FB) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Real | frequency | impulse | Bool | |||||
| countdown | Time | |||||||
| Identifier | Data type | Default value | Description |
|---|---|---|---|
| frequency | Real | 0.0 | Clock frequency in Hz |
| Identifier | Data type | Description |
|---|---|---|
| impulse | Bool | Impulse signal output |
| countdown | Time | Time until next pulse |
The function generates pulses at the output impulse with the frequency frequency.
The block always begins with a pulse and sets the next pulse after the period that has elapsed.
| Version & Date | Change description | |
|---|---|---|
| 01.00.00 | Siemens Industry Online Support | |
| 19.08.2015 | First released version | |
| 01.01.01 | Siemens Industry Online Support | |
| 16.06.2015 | LGF_Impulse calls new LGF_Frequency V1.1.1 | |
| 01.01.02 | Siemens Industry Online Support | |
| 02.01.2017 | Upgrade: TIA Portal V14 Update 1 | |
| 01.02.00 | Siemens Industry Online Support | |
| 02.02.2017 | Code optimization: no call of LGF_Frequency Fix at output "countdown" | |
| 01.02.01 | Siemens Industry Online Support | |
| 17.08.2018 | Upgrade: TIA V15 Update 2 | |
| 01.02.02 | Siemens Industry Online Support | |
| 23.11.2018 | Upgrade: TIA V15.1 | |
| 01.02.04 | Simatic Systems Support | |
| 20.09.2019 | Code refactoring, regions and more comments added | |
| 03.00.00 | Simatic Systems Support | |
| 23.04.2020 | Set version to V3.0.0, harmonize the version of the whole library | |
| 03.00.01 | Simatic Systems Support | |
| 15.02.2021 | Insert documentation | |