Beckhoff TX1200, Руководство пользователя

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Function blocks
TX1200 11 Version: 1.0
iMyPortNo : the port number associated with the connection is passed here as a parameter. The port
number is generated afresh (dynamically) each time the connection is established with the
FB_ModbusTcpOpen [
}
9] function block.
VAR_OUTPUT
VAR_OUTPUT
bBusy : BOOL;
bError : BOOL;
iErrorId : WORD;
END_VAR
bBusy : if the function block is activated, this output is set. It remains set until a feedback is received.
bError : if an error should occur during the execution of the command, then this output is set, after the bBusy
output has been reset.
iErrorId : supplies the command-specific error code (table) or the device-specific error code [ } 14] if the
bError output is set.
Error Codes Description
0x8400 Connection is already closed.
0x8401 Connection close timeout.
0x8402 Connection close resource error.
Sample of calling the function block in FBD:
PROGRAM MAIN
VAR
fbModbusClose : FB_ModbusTcpClose;
bOpen : BOOL;
bBusy : BOOL;
bError : BOOL;
nErrId : WORD;
nConnectionPort: WORD;
END_VAR
In this sample, a rising edge at the bClose input causes a TCP/IP connection to the remote partner with
network address '172.16.2.209' to be closed.
Requirements
Development environment Target platform PLC libraries to include
TwinCAT v2.7.0 and below BC9xxx (165) firmware version >=
0xB6 TcModbusTCPBC.Lb6