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7. Application Examples | Vlinx MESR9xx Modbus Gateway |
From Serial Masters To Ethernet Master, Slave IDs Fixed
Legacy Modbus slaves may have fixed IDs. To integrate these into a Modbus TCP network, a multiport MESR model (List here) can assign virtual slave IDs. For information on virtual slave IDs, see (list reference):
Figure 25. Scada to Slaves, IDs Fixed
Keep Serial Master, Add Ethernet Master(s)
In this scenario, the control system is a direct,
Figure 26. Time Critical Control System
A sophisticated Modbus gateway (MESR921 or MESR922) can connect to the devices, with slaves going to one link and master another. The gateway allows communication between slaves and master, with a redirector aspect that lets the serial master keep on communicating with the slaves.
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