Banner Sure Cross DXM700-Bx - Alternative Modbus Register Organization

There are 16 Modbus registers allocated for each device in the wireless network. The first 16 registers (1–16) are allocated
for the Gateway, the next 16 (17–32) are allocated for Node 1, the next 16 (33–48) are allocated for Node 2 and so forth.
There are no inputs or outputs on the DXM embedded Gateway but the Modbus registers are still allocated for them.
Although only seven Nodes are listed in the table, the Modbus register numbering continues for as many Nodes as are in the
network. For example, the register number for Node 10, I/O point 15 , is 175. Calculate the Modbus register number for each
device using the equation:
Register Number = I/O# + (Node# × 16)
Table 6: Modbus holding registers
I/O Point Gateway Node 1 Node 2 Node 3 Node 4 Node 5 Node 6 Node 7
1 1 17 33 49 65 81 97 113
2 2 18 34 50 66 82 98 114
3 3 19 35 51 67 83 99 115
4 4 20 36 52 68 84 100 116
5 5 21 37 53 69 85 101 117
6 6 22 38 54 70 86 102 118
7 7 23 39 55 71 87 103 119
8 8 24 40 56 72 88 104 120
9 9 25 41 57 73 89 105 121
10 10 26 42 58 74 90 106 122
11 11 27 43 59 75 91 107 123
12 12 28 44 60 76 92 108 124
13 13 29 45 61 77 93 109 125
14 14 30 46 62 78 94 110 126
15 15 31 47 63 79 95 111 127
16 16 32 48 64 80 96 112 128
Table 7: Access all wireless network registers by reading Modbus slave ID 1
DX80 Device
Slave ID Modbus Registers
DXM Gateway radio 1 Modbus registers 1–8 are inputs, 9–16 are outputs
Node 1 - Modbus registers 17–24 are inputs, 25–32 are outputs
Node 2 - Modbus registers 33–40 are inputs, 41–48 are outputs
Node 3 - Modbus registers 49–56 are inputs, 57–64 are outputs
3.4.1 Alternative Modbus Register Organization
The Sure Cross DX80 Alternative Modbus Register Organization registers are used for reordering data registers to allow host
systems to efficiently access all inputs or outputs using a single Modbus command. The register groups include the input/
output registers, bit-packed registers, and analog registers. This feature is only available with the Performance models using
version 3 or newer of the LCD firmware code.
Table 8: Alternative Modbus register organization
Name
Modbus Register Address (Decimal)
Inputs and Outputs, in order by device 2201 through 4784
Discrete Bit Packed (Status, Discrete Inputs, Discrete Outputs) 6601 through 6753
Analog Inputs (1–8) and Analog Outputs (1–8) 6801 through 9098
Sure Cross
®
DXM700-Bx Wireless Controller
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