FB_PlcStateToHmi
PLC variables for the handshake are available in the FB_PlcStateToHmi function block. The below image shows properties/variables inside this function block.
Name | Type | Description |
|---|---|---|
AxesInitialized | Bool | Used by the PLC. |
BlockedAxisDataPlc | Bool | Used by the PLC. |
BlockedTempDataPlc | Bool | Used by the PLC. |
ClientID | UINT | The client ID of the client instance that manages the handshake communication. |
DataReqFailed | Bool | Indication from the PLC that the data request has failed, need to reset the handshake state machine from the HMI. |
DataRequestPlc | Bool | PLC requesting data from the active recipe. |
DataRequestPlcActiveHmi | Bool | Is set to TRUE from HMI to inform that the HMI has received the request and is processing the data download to the PLC. |
DataRequestPlcQuitHmi | Bool | Is set to TRUE from HMI when all data download is finished. |
DataValidPlc | Bool | This is set from PLC to TRUE to indicate that the PLC has received and validated the data from the HMI and it is safe to allow user operations. |
LiveSignHMI | UINT | This will be updated from the client that is overseeing the handshake operation, no live sign within a timespan indicates a connection loss. |
ProductChangeEnable | Bool | Product change is allowed by the PLC. |
ProductChangeRequestHmi | Bool | Request to perform a change of a recipe from the HMI. |
ProductChangeConfirmPlc | Bool | Allowing a change of a recipe from the PLC. |
Reset | Bool | Reset request from the HMI if the handshake failed and the DataReqFailed flag is set. |
SaveDataRequestPlc | Bool | The PLC requests the HMI to save data from the PLC to the recipe. |
SaveDataQuitPlc | Bool | HMI sets this variable to indicate the save data request received and completed. |