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ipmux

IP Mux

The IP Mux mode is used to connect one or more IP ports to a serial port. The IP ports can use Modbus TCP, Modbus via TCP, Modbus via TCP, ROC, and DF1. More than one COM port can be selected. Each selected COM port can be connected to one or more IP ports using any of these protocols.

IP Mux

The IP ports are masters and each selected COM port is a slave. The slave can also be connected to one or more master COM ports using the Serial Mux mode.

The IP Mux mode can be used to access Internal Registers if the protocol is modbus and the IP port is associated with an RTU ID.

A connection is configured by a row in the form that has parameters and check boxes. The first check box needs to be checked for the connection to be enabled. The second check box needs to be checked to enable modbus access to Internal Registers.

The configuration parameters are:

ProtocolType of modbus and transport method to use.
CountNumber of simultaneous connections.
IP PortIP port number. It is best to use 1024 and above since lower numbers are well-known ports.
COM PortSerial port number in the range 0 to 4.
Msg TypeType of messages. The most common message types are supported: Modbus, DF1, and ROC. If Modbus/ROC is selected then the source port messages can be Modbus or ROC or both intermixed. If DF1 is selected the source port messages can only be DF1 HALF DUPLEX with TCP protocol.
Internal RTU Address Modbus RTU address used to access the IP100s internal registers.

Example #1: Modbus IP Masters

The example in this first figure shows many IP masters with various protocols connected to a serial slave. Configuration requires use of the IP Mux form only.

Modbus IP Masters

Example #2: Modbus IP Masters with Serial Masters

The example in this second figure shows many IP masters and many serial mux masters connected to a serial slave. Both the IP Mux form and the Serial Mux form are required for this configuration.

Modbus IP Masters with Serial Masters

Example #3: Modbus IP Masters with Modbus RTU

The example in this third figure shows many IP masters with various protocols connected to a serial slave and accessing internal registers. Configuration only requires use of the IP Mux form. The RTU ID on the form is set to 2 and enabled using the check box. Modbus request messages received by the IP100 with an RTU ID that is not 2 are sent to the serial slave. If the RTU ID is 1 then the serial slave returns a response. Modbus request messages received by the IP100 with an RTU ID that is 2 are used to access Internal Registers.

 Modbus IP Masters with Modbus RTU

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ipmux.txt · Last modified: 2023/08/29 11:50 by byee