B&B Electronics Vlinx MESR9xx - Manual (Page 30)

4. Properties Vlinx MESR9xx Modbus Gateway
Page 26 Manual Documentation Number MESR9xx-4508m
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Character Timeout
The character timeout is the maximum time the gateway allows between characters from
the slave device, used only in RTU mode. The default is 10ms.
CRC/LRC Error Check
The CRC/LRC check calculates the CRC/LRC for the message received, and compares
this to the CRC/LRC with the message. If not the same the message is rejected.
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.