Menu Map To Modbus Device Id Setting - Honeywell XYR 5000 Series User Manual

Honeywell Industrial Wireless
6.1.2: Modbus Device ID Setting
NOTE
The Base Radio provides different De-
vice ID modes in order to support a
wide range of Modbus equipment.
In the Register Mapping Mode the
data for the Base Radio and all Trans-
mitters are located under a single device
ID. This ID may be any allowable Mod-
bus address between 1 and 247 that
doesn't conflict with an address of exist-
ing device or Modbus network.
In the Device ID Mapping Mode each
Transmitter is given its own unique ID
and registers. The Transmitter ID is
equal to the value of the Base Radio ID
added to the Transmitters RF ID.
NOTE
Make sure that the NUM WI setting has
been configured properly or the Modbus
addressing scheme could be affected.
To properly set the NUM WI setting
see section 4.5.
14 Rev. 3
11/04
The Modbus Device ID allows a PLC or DCS to find the proper Base Ra-
dio 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 com-
municating. The device ID range is dependent on the MODMAP setting in
the Base Radio. (See Modbus Mapping Mode section 6.1.4 for more infor-
mation.)
In the Register Mapping Mode you may select any device ID from 1 to
247. This number will be the 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 Commu-
nications Protocol section.
In the Device ID Mapping Mode you may select any address from 1 to
247 minus the number of Transmitters communicating with this Base Ra-
dio. The change in the device ID ceiling is due to the fact that each Trans-
mitter'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 the
Transmitters' address.
For example: If there are two Base Radios on the RS-485 network, and
each of the two Base Radios are communicating with three Transmitters,
the device ID scheme would result as follows:
Base Radio with Modbus device ID 001
Transmitter with RF ID 1 is found at Modbus device ID 002
Transmitter with RF ID 2 is found at Modbus device ID 003
Transmitter with RF ID 3 is found at Modbus device ID 004
Base Radio with Modbus device ID 101
Transmitter with RF ID 1 is found at Modbus device ID 102
Transmitter with RF ID 2 is found at Modbus device ID 103
Transmitter with RF ID 3 is found at Modbus device ID 104
More detail about the registers at each address, and their meaning, can be
found in the Modbus Communications Protocol section.
Once you have determined the Modbus Device ID you wish to use, follow
the Base Radio menu map shown in Figure 6.2 to configure the device ID.
The factory default is 001:
Figure 6.2: Menu Map to Modbus Device ID Setting
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Wireless Base Radio