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at the same time, the serial port will be congested. If the network is compared to
the highway, the serial port is compared to the single-log bridge, then the original
way is to pass the traffic flow of the highway on the single-log bridge.
Register save Modbus Gateway (7146) solves the above problem. It can
temporarily save the register data obtained from the query in the Modbus gateway,
so that when Modbus TCP query comes, Modbus gateway can immediately return
the instruction, and truly give play to the rapid characteristics of Modbus TCP. On
the other hand, 7146 can actively send instructions from the serial port to
automatically update the data content of the currently saved register and save a
copy of the latest register value.
In addition, 7146 is a fully automatic Modbus Gateway without configuration.
Users do not need to configure required register addresses, function codes and
slave station addresses. The 7146 will automatically recognize and dynamically
add these registers according to Modbus TCP instructions sent from the network
port.
When monitored by multiple computers, 7146 can show a good response speed.
Regardless of the baud rate of the serial port, it can generally give the upper
response data within 3ms. And it shows a good real-time update speed of serial
data.
Modbus gateway with register storage is a real Modbus TCP to Modbus RTU,
which gives full play to advantages of fast speed and multi-host simultaneous
query of Modbus TCP.
Note that when the serial server is a TCP client, it does not have a storage
function and will automatically switch to a non-storage type.
The features of the storage Modbus are listed below:
1) The first Modbus TCP query instruction is non-stored. Because you have to
wait for the RTU device to slowly return data before returning the register
contents to the network port.
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