Beckhoff TX1200, Manual

Page: 8 / 16

Overview
TX1200 8 Version: 1.0
2 Overview
The library contains function blocks that permit the exchange of data between the BC9xxx Bus Controller
and a remote partner on the MODBUS/TCP port.
Comments
• The number of IP connections that may be open simultaneously is restricted to four, in order to
maintain the use of resources at a minimum. If it is necessary to establish a further connection, a
connection that is not required must first be closed.
• After about 10 seconds, a connection that has not been used during that period is automatically closed,
and must be reopened if needed.
Function blocks
Name Description
FB_ModbusTcpOpen [ } 9]
Open a MODBUS/TCP connection to a remote
partner.
FB_ModbusTcpClose [ } 10]
Close a MODBUS/TCP connection to a remote
partner.
FB_ModbusTcpRequest [ } 12]
Send a MODBUS request to a remote partner.