RC Systems ViewSmart 1600+ Operation Manual page 68

may be set for Server and all others must be Clients. This single Server transmits a beacon which all of the
network's Clients synchronize to. ONLY ONE SERVER PER NETWORK.
4.6.4.2.1 Wireless Modbus® Slave Mode
Wireless Modbus® allows one or many ViewSmart 1600+s to function as wireless Modbus® slaves by
connecting their RS-485 Modbus® slave ports to a radio modem. These wireless networks require a
Modbus® master such as a DCS, HMI or another R.C. Systems Controller; also equipped with a radio
modem. As in all R.C. Systems wireless networks, one transceiver must be designated as Server and all
others as Clients. No special configuration is required by the master or slave since this is a standard
Modbus® RTU network. However, radios must have the same Hop Channel and System ID settings to
communicate.
The entire ViewSmart 1600+ Modbus® database, including registers and supported Function Codes, is
documented in Appendix 3.
4.6.4.2.2 Wireless Modbus® Master Mode
Each Channel's Data From menu must be configured with the correct Modbus® values to match the slave
device. Wired and wireless inputs may be mixed between the ViewSmart 1600+'s channels so it is also
possible to accept wired signals from analog input option PCB's described in Chapter 4.3.1.
This is a popular application when the Modbus® slave is another remote ViewSmart 1600+, ST-71 or our
ST-90/QUAD controller available with built in radio modem compatible with the ViewSmart 1600+ Radio
Kit. Other Modbus® slave devices may also be converted to wireless by addition of another Radio Kit at
the slave's location.
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