1.2Multi-host and Modbus Gateway
The model with this function is ZLAN8343 or zlan8343-5. These two models have the
following two functions:
1) Modbus Gateway can be configured. As long as set the “Device/Advanced
Parameter/Transformation Protocol” to "Modbus TCP to RTU", it is switched to
Modbus Gateway mode. The upper computer can be queried with Modbus TCP,
while PLC can use RTU instructions. The Modbus of 8343 is storage Modbus
Gateway, and the polling is more real-time.
2) Multiple hosts. When set to Modbus Gateway, multiple host queries can be made,
and 8303 will answer separately to realize multi-host query. In the non-Modbus
Gateway mode, for the 8343 model, you just check the "multi-host" support in more
advanced options it can also implement the multi-host queries.
ZLAN-multi-host technology is a technology developed for multi-host monitoring a
device at the same time. In the ordinary serial device server or DTU, when there isA, B
two monitoring computer, A and B can send data to the device, but data the device
received from the serial port will be sent to theAand B at the same time. In other words,
when A and the device communicate, B will receive unwanted data, which will interfere
B's communication. Many software protocols will not be able to adapt to this situation
and may not work.
The ZLAN multi-host technology can can achieve the communication scheduling
betweenAand B computers.WhenAcommunicates with the device, the response data
of the device is only sent to A; When B needs to communicate, you can quickly switch
to B. ZLAN8343 will enable multiple computers to monitor the same device
simultaneously.
1.3P2P 3G/4G Serial Device Server
The model with this function is ZLAN8303N or ZLAN8303N-5. This model integrates
