Byte Parameter Data type Start value Description12 ... 27 local_tsap_id ARRAY[1..16] ofBYTE00h ... n Remote port number(possible values: 2000 ... 5000),local_tsap_id[1] = high byte of port no inhexadecimal representation,local_tsap_id[2] = low byte of port no in hex-adecimal representation,local_tsap_id[3-16] = irrelevantNote: Make sure that each value oflocal_tsap_id that you use in your CPU isunique.28 ... 33 rem_subnet_id ARRAY[1..6] ofBYTE00h ... This parameter is currently not used. Value 00h(fix).34 ... 39 rem_staddr ARRAY[1..6] ofBYTE00h ... This parameter is currently not used. Value 00h(fix).40 ... 55 rem_tsap_id ARRAY[1..16] ofBYTE00h ... This parameter is currently not used. Value 00h(fix).56 ... 61 next_staddr ARRAY[1..6] ofBYTE00h ... This parameter is currently not used. Value 00h(fix).62 ... 63 spare WORD 0000h irrelevant8.1.7 FB 66 - TDISCON - Terminating a connectionFB 66 TDISCON terminates a communications connection from the CPU to a communi-cations partner.The FB 66 TDISCON closes the local communications access point. The connectionbetween the user program and the communications level of the operating system is termi-nated.FB 66 TDISCON is an asynchronously functioning FB, which means that its processingextends over several FB calls. To start terminating a connection, call FB 66 with REQ = 1.After FB 66 TDISCON has been successfully called, the ID specified for FB 65 TCON isno longer valid and thus cannot be used for sending or receiving.The job status is indicated at the output parameters RET_VAL and BUSY. STATUS corre-sponds to the RET_VAL output parameter of asynchronously functioning SFCs (see alsoMeaning of the Parameters REQ, RET_VAL and BUSY with asynchronous SFCs).The following table shows the relationships between BUSY, DONE and ERROR. Usingthis table, you can determine the current status of FB 66 or when the establishment of theconnection is complete.BUSY DONE ERROR DescriptionTRUE irrelevant irrelevant The job is being processed.FALSE TRUE FALSE The job was completed successfully.Use with TCP native andISO on TCPUse with UDPDescriptionVIPA SPEED7 Network CommunicationOpen Communication > FB 66 - TDISCON - Terminating a connectionHB00 | OPL_SP7 | Operation list | en | 18-30 129
