Shanghai ZLAN Information Technology Co., Ltd Tel: +86-17321037177 http://www.zlmcu.com
45
Figure 35 disables the storage function
7.4 Multi-host Function
As shown in figure 35, "RS458 multi-host support" and "RS485 bus collision
detection function" are ZLAN's multi-host functions. They are generally both
enabled and disabled at the same time. After enabling, the device that converts
the protocol into Modbus TCP has the function of storage Modbus gateway;
otherwise, it is a non-storage Modbus gateway. If the conversion protocol is none,
generally, the user-defined RS485 protocol can also have the function of serial
devices accessed by multiple hosts at the same time, which cannot be achieved in
the pure RS485 network, because the sending of multiple master stations at the
same time will cause conflicts on the RS485 bus. The multi-host of ZLAN serial
port server can "coordinate" the RS485 bus so as to achieve the purpose of
multi-host access.
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