Chengdu Ebyte Electronic Technology Co., Ltd.
NB1A1User Manual
Copyright ©2012–2023
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Chengdu Ebyte Electronic Technology Co., Ltd.
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5.4.4 Storage Gateway
The storage gateway not only arbitrates the bus data, but also stores the repeated read
instructions. When different hosts request the same data, the gateway does not need to ask the RTU
device register status many times, but directly returns the cached data in the storage area, which
greatly improves the multi-host request processing capability of the gateway, and also reduces the
time consumed by the whole request process. Users can customize the polling interval and
instruction storage time of the storage area according to requirements.
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As an optimization of multi-host request performance, storage gateway can only work in
TCP server mode, which improves the response speed on the network side.
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Features:
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(1) The gateway has a cache for storing instructions and returning results (125 registers
in 03/04 code and 2000 registers in 01/02 code);
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(2) RTU response time out automatically empty the cache, to ensure the real-time and
authenticity of data;
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(3) The polling interval can be customized, 0-65535ms(default :200ms);
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(4) The gateway will poll the RTU device according to the instruction storage time used
for configuration. If the MODBUS host does not query the instruction again within the
storage time, the gateway will automatically delete the stored instruction and release the