Honeywell ISM BAND XYR 5000 LINE - Manual (Page 30)

distance. If you encounter communication problems between the Base Radio and server
computer or existing system, try a slower baud rate setting.
Once you have determined the Modbus Baud Rate you wish to use, follow the Base
Radio menu map shown in Figure 6-1 to configure the Baud Rate. The factory default is
19.2 K.
Figure 6-1 Menu Map to Modbus Baud Rate Setting
6.1.2 Modbus Device ID Setting
The Modbus Device ID allows a PLC or DCS to find the proper Base Radio on a RS-485
Network.
Because Modus needs a device ID for each Transmitter, they have been virtually
mapped according to the Base Radio with which they are communicating. The device ID
range is dependent on the MODMAP setting in the Base Radio. (See Modbus Mapping
Mode section 6.1.4 for more information.)
In the Register Mapping Mode you may select any device ID from 1 to 247. This number
will be the device Modbus device ID at which all the readable registers for the Base
Radio and every Transmitter will be located. More detail about each register, and its
meaning can be found in the Modbus Communications Protocol section.
In the Device ID Mapping Mode you may select any device ID from 1 to 247 minus the
number of Transmitters communicating with this Base Radio. The change in the device
ID ceiling is due to the fact that each Transmitter’s device ID is located at its RF ID + the
Base Radio device ID. Thus you need the space beyond the Base Radio address to
contain all of the Transmitters’ addresses.
For example: If there are two Base Radios on the Modbus RS-485 network, and each of
the two Base Radios are communicating with three Transmitters, the device ID scheme
would result as follows:
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