Reset Block with Acknowledgement
Full Name
Lib.Mervis.v1_0.ResetBlockWithAck
Required Project References
- Lib.Mervis
Description
A block used to generate reset and acknowledgement pulses based on input from I/O or HMI. Version 1.1 of the block is identical but includes error state handling!
Usage in ST
program test
var
reset: lib.mervis.v1_0.ResetBlockWithAck;
end_var
reset();
end_program
Inputs
| Name | Data Type | Retain | Mandatory Connection | Meaning | |
| HwResetInput | bool | No | Yes | Input for reset button from I/O | |
| HwAckInput | bool | No | No | Input for acknowledgment button from I/O | |
| Delay | time | No | No | Duration of the generated pulse | |
| PulseCount | int | No | No | Number of pulses generated during Delay. Valid range is 1..20 | |
| CombinedAckAndReset | bool | No | No | If true, the acknowledgment pulse is generated simultaneously with reset pulses |
Outputs
| Name | Data Type | Meaning |
| Out | bool | Reset output |
| Ack | bool | Acknowledgment output |
Local Variables
| Name | Data Type | Meaning |
| SwReset.In | bool | Variable for reset from HMI |
| SwAck.In | bool | Variable for acknowledgment from HMI |
Detailed Function Description
The block is used to generate reset and acknowledgment pulses from buttons connected to I/O or from HMI. A rising edge on the HwResetInput or SwReset.In input generates PulseCount pulses on the Out output for the duration of Delay. Similarly, a rising edge on the HwAckInput or SwAck.In input generates PulseCount pulses on the Ack output if CombinedAckAndReset is set to false. Otherwise, acknowledgment pulses are generated simultaneously with reset pulses. The triggering inputs do not need to be returned to the inactive level; the block manages this automatically.