Ebyte E180-DTU(Z20-ETH) User Manual page 41

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Chengdu Ebyte Electronic Technology Co.,Ltd.

request the same data without the RTU device register status, and directly return to storage area cache data, greatly improve the

gateway more host request processing capacity, but also shorten the time consumed by the entire request process. The user can

customize the storage area instruction polling interval and the instruction storage time according to the requirements.

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

mode, which improves the response speed of the network side.

characteristic:

（1） The gateway has a 5K cache for storing instructions and return results (reading 10 holding registers, for example,

can store 189 instructions and return results);

（2） RTU response timeout automatically empty the cache to ensure the real-time and authenticity of data;

（3） Query interval can be customized, 0-65535ms;

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

MODBUS host does not query the command again during the storage time, and the gateway automatically removes

the storage instruction to release the cache;

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

（6） Only support 01,02,03,04M od bus function code query results storage;

Storage gateway upper computer and web page configuration:

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E180-DTU(Z20-ETH) User Manual

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