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2) If a particular instruction is no longer queried by the host computer on the
network side within 5 seconds, the instruction is automatically deleted and no
longer sent from the serial port to the RTU device.
3) Currently, it can store 10K Modbus cache. For ordinary single-register query,
about 500 instructions can be stored at the same time.
4) When there are multiple instructions at the same time were queried, send in
accordance with the order, send first instruction
first instruction reply
wait for 485 anti-collision time (refer to many host part)
the next instruction
to send... . Return to the first instruction after the last instruction has been
answered.
7.3 Disable Storage Functionality
Although the stored Modbus has a fast response speed, some users do not want
the RTU device to receive a large number of query instructions, which will affect
the internal processing speed of the instrument. You can turn off the storage
function at this point.
To disable storage, click the “more advanced options” button in the “Parameters
Setting” dialog box and remove one of the support and one of the enable options
shown in figure 35 by clicking ok. Then go back to device Settings and click modify
Settings.
Note that when configuring the transfer protocol in a Web method, the default is a
non-storage Modbus gateway.
