Block Symbol Description
DB 43 RECV DST DB Receive data block
FB 9 RECV_440 Receive standard FB for data
FB 10 SEND_440 Send standard FB for data
FC 21 SEND Sending Data
FC 22 RECEIVE Receiving data
Table 9-2 CP 440 1 CYC
Block Symbol Description
OB 1 CYCLE Cyclic program processing
OB 100 RESTART Cold restart processing
DB 21 SEND IDB Instance DB for SEND_440 FB
DB 22 RECV IDB Instance DB for RECV_440 FB
DB 40 SEND WORK DB Work DB for the standard FB 10
DB 41 RECV WORK DB Work DB for the standard FB 9
DB 42 SEND SRC DB Send data block
DB 43 RECV DST DB Receive data block
FB 9 RECV_440 Receive standard FB for data
FB 10 SEND_440 Send standard FB for data
FC 21 SEND Sending Data
FC 22 RECEIVE Receiving data
Table 9-3 CP 440 ASCII BCC
Block Symbol Description
OB 1 CYCLE Cyclic program processing
OB 100 RESTART Cold restart processing
FB 9 RECV_440 Receive standard FB for data
FB 10 SEND_440 Send standard FB for data
FC 21 SEND Sending Data
FC 22 RECEIVE Receiving data
FC 23 GEN BCC Creates BCC for the sender
FC 24 CHK BCC Checks the BCC when data is received
DB 21 SEND IDB Instance DB for SEND_440 FB
DB 22 RECV IDB Instance DB for RECV_440 FB
DB 40 SEND WORK DB Work DB for the standard FB 10
DB 41 RECV WORK DB Work DB for the standard FB 9
DB 42 SEND SRC DB Send data block
DB 43 RECV DST DB Receive data block
Programming Example for Standard Function Blocks
9.4 Blocks Used
Point-to-point connection CP 440 Installation and Parameter Assignment
Equipment Manual, 03/2022, A5E00057742-AE 109
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