FB_OCPP1_Client

This function block represents an OCPP client that can be connected to an OCPP server. There are two directions of communication.

The send methods are used when sending requests to the server. In these methods, the response from the server is processed directly and stored in the output parameters of the methods.

If, on the other hand, a request is received from the server using one of the Receive methods, the response must be sent using the appropriate Response method.

The client sends an internal Heartbeat, the time interval of which can be adjusted using the HeartbeatInterval Property. If the client does not receive a response from the server to a Heartbeat, a Reconnect to the server is then attempted. For all other message types, a timeout error is output on the client function block if there is no response.

Syntax

FUNCTION BLOCK FB_OCPP1_Client
VAR_OUTPUT
    bValid              : BOOL;
    bBusy               : BOOL;
    bError              : BOOL;
    eErrorResult        : HRESULT;
    eErrorAction        : E_OCPP1_Action;
END_VAR

Outputs

Name	Type	Description
bValid	BOOL	The interface to the driver in the background exists.
bBusy	BOOL	Is TRUE as long as the function block is busy with processing.
bError	BOOL	Becomes TRUE when an error situation occurs.
eErrorResult	HRESULT	Last error present on the function block.
eErrorAction	E_OCPP1_Action	OCPP command for which the error occurred.

Properties

Name	Type	Access	Description
HeartbeatInterval	TIME	Get, Set	Internal HeartbeatInterval from the client. Another Heartbeat can also be sent manually using the SendHeartbeat method. With the internal HeartbeatInterval, it should be noted that the server responds in its BootNotification.conf with a specified HeartbeatInterval for the client. This specified HeartbeatInterval is then set internally. However, the HeartbeatInterval can then be changed as required during runtime.
IsConnected	BOOL	Get	Status of the connection to the OCPP server.
IsPending	BOOL	Get	Waiting for completion of the request.

Further Information