N-Tron ESERV-M12T, User Manual

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Properties ESERV-M12T Modbus Gateway ESERV-M12T Modbus Gateway
22 ESERV-M12T (Rev. 1210)
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 the Ethernet
Modbus Gateway 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 ESERV-M12T Modbus gateways include TCP.