Configurable Gateway - Ebyte NB183 User Manual

Eight serial port server

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Chengdu Ebyte Electronic Technology Co.,Ltd.

NB183S&NB183_User Manual

As the optimization of multi-host request performance, the storage gateway can only work in the TCP server mode,

which improves the response speed of the network side.

Features:

(1) The gateway has a 2K cache for storing instructions and returning results (reading 10 holding registers as an example,

about 67 instructions and returning results can be stored);

(2) The RTU response time-out automatically clears the cache to ensure the real-time and authenticity of the data;

(3) The polling interval can be customized, 0-65535ms (default: 200ms);

(4) The gateway will poll the RTU device according to the storage time of the instruction used for configuration. If the

MODBUS host does not query the instruction again during the storage time, the gateway will automatically delete the

storage instruction to release the cache;

(5) The first command and control command (05, 06, 0F, 10 function codes) will directly access the RTU device;

(6) Only 01, 02, 03, 04 Modbus function code query result storage is supported;

5.4.5 Configurable Gateway

The gateway automatically polls the RTU device registers according to the pre-configured MODBUS commands (only

supports the configuration of the MODBUS read command). The commands in the non-storage table will directly operate

the RTU device, and the frequently read commands can be stored in the gateway in advance, which can shorten the

Response time (instruction to query configuration), data will not be sent directly to the server and will only be returned

after a Modbus host request. Similar to the usage of "Simple Protocol Conversion", if you need to automatically upload

data to the server, please select "Auto Upload". Due to the above features, the serial port side of the configurable gateway

can only be connected to Modbus slaves.

Instruction storage description (increase, instruction error and format error cannot be added):

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