1.3.1 DXM Modbus Registers
The DXM700-Bx Wireless Controller may have up to four internal Modbus slave devices:
DXM Internal Modbus Slave IDs (factory default)
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 DXM700
203
Base Board Outputs—Outputs of the DXM700.
201
LCD Board—The user has access to the LED indicators on the DXM700.
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 local registers, the I/O base, and the LCD slave IDs are fixed, but the internal radio
slave ID can be changed if needed.
Table 2: Modbus registers for internal local registers (Modbus slave ID 199)
Local Registers
Type
Description
1–845
32-bit integer
Local data registers
846–849
32-bit integer
Reset, Constant, Timer
851–900
32-bit non-volatile integer
Data flash, non-volatile
901–1000
Reserved for internal use
1001–5000
Floating point
Floating point registers, local data registers
5001–7000
32-bit integer
Local data registers
7001–8000
32-bit non-volatile integer
Data flash, non-volatile
> 10000
Read only virtual registers, system-level data
Modbus Registers for the LCD Board (Modbus Slave ID 201)
Modbus Register
LED
Color
State
1102 : bit 0
LED 1
Red
1 = On
0 = Off
1103 : bit 0
LED 2
Amber
1104 : bit 0
LED 3
Red
1105: bit 0
LED 4
Amber
1107: bit 0
LED 1
Green
1108 : bit 0
LED 2
Green
1109 : bit 0
LED 3
Green
1110 : bit 0
LED 4
Green
Modbus Registers for the Base Board Outputs (Modbus Slave ID 203)
Modbus Register
Range
Description
2101
0–1
PNP Output 1
2102
0–1
PNP Output 2
2103
0–1
PNP Output 3
2104
0–1
PNP Output 4
Sure Cross
®
DXM700-Bx Wireless Controller
8
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