Supported M! Commands
SDI-12 Command
Register Value
xM!
0 or 10
xM1!
11
xM2!
12
xM3!
13
xM4!
14
xM5!
15
xM6!
16
xM7!
17
xM8!
18
xM9!
19
Supported C! Commands
SDI-12 Command
Register Value
xC!
1 or 20
xC1!
21
xC2!
22
xC3!
23
xC4!
24
xC5!
25
xC6!
26
xC7!
27
xC8!
28
xC9!
29
The Modbus configuration registers are listed. All registers are defined as Modbus holding registers. The factory default
values are shown in parentheses. All values are in decimal, unless noted otherwise.
Device/CMD Configuration
Registers (Default Value)
Enable
Device Address
Device Command
SDI-12 Device/CMD 1
1751 (1)
11001 (48) 3
11002 (10)
SDI-12 Device/CMD 2
1701 (0)
11201 (49)
11202 (10)
SDI-12 Device/CMD 3
1651 (0)
11401 (50)
11402 (10)
SDI-12 Device/CMD 4
1601 (0)
11601 (51)
11602 (10)
SDI-12 Device/CMD 5
1551 (0)
11801 (52)
11802 (10)
SDI-12 Device Result Registers
The result registers store all information received from the SDI-12 devices.
The registers are 16-bit registers and require two registers to store a 32-bit value. The factory default configuration defines
the result registers as 32-bit registers, floating point format, and the first nine result registers are enabled for use. A host
system reads the SDI-12 device data from these registers.
Result Registers
Register 1
Register 2
Register 3
Register 4
Register 5
Register 6
SDI-12 Device/CMD 1 Result Upper
11101
11103
11105
11107
11109
11111
SDI-12 Device/CMD 1 Result Lower
11102
11104
11106
11108
11110
11112
SDI-12 Device/CMD 2 Result Upper
11301
11303
11305
11307
11309
11311
SDI-12 Device/CMD 2 Result Lower
11302
11304
11306
11308
11310
11312
SDI-12 Device/CMD 3 Result Upper
11501
11503
11505
11507
11509
11511
SDI-12 Device/CMD 3 Result Lower
11502
11504
11506
11508
11510
11512
SDI-12 Device/CMD 4 Result Upper
11701
11703
11705
11707
11709
11711
SDI-12 Device/CMD 4 Result Lower
11702
11704
11706
11708
11710
11712
SDI-12 Device/CMD 5 Result Upper
11901
11903
11905
11907
11909
11911
SDI-12 Device/CMD 5 Result Lower
11902
11904
11906
11908
11910
11912
3 The default device addresses 48 through 52 are in ASCII.
Sure Cross
®
DXM100-Bx and DXM1000-Bx Wireless Controllers
34
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