Dxm Modbus Registers - Banner Sure Cross DXM1200-Bx Instruction Manual

Using Action, Read/Write, and Threshold Rules allows you to manipulate the processor's Local Registers. The ScriptBasic
programming capabilities extends the use of Local Registers with variables to create a flexible programming solution for
more complex applications.
The processor's Local Registers are divided into three different types: integer, floating point, and non-volatile. When using
Local Registers internally, the user can store 32-bit numbers. Using Local Registers with external Modbus devices follows
the Modbus standard of a 16-bit holding register. Local Registers are accessible as Modbus ID 199.
Accessing the I/O Base and the LCD follows the same communication as an external Modbus device. Each device has an
ID number to uniquely identify itself. The LCD is Modbus ID 201.
Ethernet
RS-485 (master)
Internal
Micro USB

1.3.1 DXM Modbus Registers

The DXM1200-Bx Wireless Controller may have up to three internal Modbus slave devices:
Modbus Slave ID Device
1 DX80 Performance Gateway or MultiHop ISM Radio—MultiHop wireless devices connected to the internal MultiHop radio
should be assigned Modbus Slave addresses starting at 11.
199 Local Registers—Internal storage registers of the DXM1200
201 LCD—The user has access to the LED indicators on the DXM1200.
All Modbus registers are defined as 16-bit Modbus Holding Registers. When connecting external Modbus slave devices,
only use Modbus slave IDs 2 through 198. The Modbus IDs for the local registers, LCD, and ISM radio are fixed.
Modbus Registers for Internal Local Registers (Modbus Slave ID 199)
Local Registers Type
1–845 32-bit integer
846–849 32-bit integer
851–900 32-bit non-volatile integer
901–1000
1001–5000 Floating point
5001–7000 32-bit integer
Processor/Outputs (Base Board)
Local Registers
(Modbus ID 199)
Local Regi sters
Integer
Local Registers
Float
Local Registers
Non-Volatile
Processor Controlled
Cellular Modem
Modbus Data Traffic
Control
Figure 3. DXM1200 Modbus overview
DXM Internal Modbus Slave IDs (factory default)
Description
Local data registers
Reset, Constant, Timer
Data flash, non-volatile
Reserved for internal use
Floating point registers, local data registers
Local data registers
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Sure Cross DXM1200-Bx Wireless Controller
ISM Radio (Modbus ID 1)
Gateway or MultiHop
User Display (Modbus ID 201)
LED / LCD Display
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