Configurable Gateway - Ebyte NA111-A User Manual

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Chengdu Ebyte Electronic Technology Co.,Ltd.

server mode, increasing the responsiveness of the network side.

peculiarity:

（1） The gateway allocates a total of 5K space for storage of instructions and storage that

returns results;

（2） RTU responds to timeouts by automatically deleting storage instructions to ensure the

real-time nature of the data;

（3） The gateway polls the RTU device based on the instruction storage time used for the

configuration,theMODBUS host does not query the instruction again at storage time, and

the gateway automatically deletes the storage instruction to free up memory;

（4） The first instruction is transmitted directly to the RTU device;

（5） Only0 1,02,0 3,04MODBUS function code query results storage;

Storage gateway parameter configuration:

（1） Mode configuration:AT is configured as MOD3,and the webpage, computer selects the

storage gateway.

（2） Modbus Answer TimeOut Configuration: Range:0-65535ms,default:500ms.

（3） Modbus instruction storage time Settings: Range:0-254s,for instruction storage time

settings, default:10s.

4.5.4 Configurable gateway

Serial port automatically polls the RTU device register (MODBUS read instructions only are

supported) based on the configured MODBUS instructions, and unconfigured instructions and

control instructions operate directly on the RTU device. You can store frequently read instructions in

advance in the gateway, reducing response times (querying configured instructions). Due to the

above features, only Modbus from the serial side of the storage gateway can be connected.

Figure 4- 10 Storage Gateway

NA111-A User Manual

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