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PCP_CONNECT

Type	Function block
Description	Using this function block you can set up communication connections to each PCP device in the INTERBUS, even to PCP Connect function blocks available in higher-level controllers. The function block is able to establish connections to other PCP function blocks (Initiate_Request), to receive data, and to process a connection query (Initiate_Indication).
Notes	Function blocks have to be instantiated. The instance name of the function block has to be declared in the 'Variables' table of the POU where the FB is going to be used. The instance name must be unique within the POU.
Parameters	Inputs EN_C Data type: BOOL Description: The EN_C input (EN_C = Enable Connect) is for establishing and maintaining communication connections. The following applies: EN_C = TRUE The connection is established or maintained. Connection queries of other function blocks are answered positively. EN_C = FALSE The connection has been terminated. Connection queries of other function blocks are answered negatively. Input/Output ADD_ERROR Data type: ARRAY OF WORD with 7 elements Description: If an error occurs, the error code is written into ADD_ERROR. The error codes represent PCP error messages. These are described in the PCP manual. If an incorrect format is used, the function block returns an error (ERROR=TRUE). Note The error codes stored in ADD_ERROR are only valid in the cycle in which ERROR changes from FALSE to TRUE. PARTNER Data type: STRING Description: Specifies the Communication Reference CR. Note that the CR can change, for example, due to a project-wide renumbering. In this case, you have to adapt the CR numbers here, otherwise incorrect devices can be addressed. Outputs VALID Data type: BOOL Description: This parameter displays whether a valid communication connection exists. The parameter ID is only valid if VALID=TRUE. ERROR Data type: BOOL Description: With a rising edge, this output displays that an error has occurred. Within the cycle, in which the rising edge occurs, the error code can be read from ADD_ERROR. ID Data type: INT Description: This parameter is the designation of the established communication connection. Using the parameter ID it is differentiated between several communication connections. ID is only valid if the parameter VALID is TRUE.