B&B Electronics ESR901 Dokumentacja Pobierz pdf (Strona 32)

4. Properties Vlinx MESR9xx Modbus Gateway

Page 28 Manual Documentation Number MESR9xx-0109m

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Message Retries

Message retries is the number of times the gateway resends the message if it gets a

character timeout or CRC/LRC error. The default is two.

Modbus TCP Message

The Modbus TCP message may be broken up into multiple different TCP frames. The

Modbus TCP message contains three main blocks to the Modbus TCP message. The first

is the MBAP header. It describes the Modbus message, including the Transaction

Identifier, Protocol Identifier, Length and Unit ID. The second part is the Function Code.

The third is the Data. The Function Code and Data are the standard Modbus PDU.

Model

The Model number of the currently selected Modbus gateway is displayed on the Login

page of Vlinx Manager.

Network Mode

The network mode is the method used to configure the network parameters. It is either

“DHCP” or “Static IP”.

Network Protocols

Network Protocols available for use on MESR9xx Modbus gateways include TCP.

Password

When you first receive the MESR9xx Modbus gateway from the factory the Password is

blank so that you can initially access the Modbus gateway without entering a value into

this field. To ensure security you should create and save a password the first time you

configure the Modbus gateway. After a password has been set up it must be entered each

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B&B Electronics ESR901 Dokumentacja Strona 32