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4.4. Notes
When large data exchange occurs in Multi-drop mode without flow-control enabled, the master unit may
experience data loss. It may also experience occasional disconnections and/or system rebooting
especially when bi-directional communication happens. It is strongly recommended to perform extensive
performance test before any real world field applications.
The master unit would try to connect all slave units specified by S-register 46, 54, 55 and 56. If non-
existing or inactive slave addresses are entered in these S-registers, the overall performance will
degrade due to frequent connection trials to non-existing/inactive slaves. It may also force
disconnections for overall performance and outputs disconnect messages repeatedly.
Node-switching mode provides nearly equivalent performance as single connection mode. It is always
recommended to use flow-control for both of Multi-Drop Mode and Node Switching Mode.
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