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Device/CMD Configuration
Registers (Default Value)
Enable
Device Address
Device Command
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
Result Registers
Register 7
Register 8
Register 9
Register 10
Register 11
Register 12
SDI-12 Device/CMD 1 Result Upper
11113
11115
11117
11119
11121
11123
SDI-12 Device/CMD 1 Result Lower
11114
11116
11118
11120
11122
11124
SDI-12 Device/CMD 2 Result Upper
11313
11315
11317
11319
11321
11323
SDI-12 Device/CMD 2 Result Lower
11314
11316
11318
11320
11322
11324
SDI-12 Device/CMD 3 Result Upper
11513
11515
11517
11519
11521
11523
SDI-12 Device/CMD 3 Result Lower
11514
11516
11518
11520
11522
11524
SDI-12 Device/CMD 4 Result Upper
11713
11715
11717
11719
11721
11723
SDI-12 Device/CMD 4 Result Lower
11714
11716
11718
11720
11722
11724
SDI-12 Device/CMD 5 Result Upper
11913
11915
11917
11919
11921
11923
SDI-12 Device/CMD 5 Result Lower
11914
11916
11918
11920
11922
11924
SDI-12 Device Settings
The following are generic sampling, power and warmup parameters that should work for all SDI-12 devices. See the tested
device table below. In most cases, parameters will not need to be adjusted but if needed there are three common SDI-12
device parameters that control the communications and power of the SDI-12 device. Contact Banner Engineering Corp
support for more guidance.
•
Sample Rate
. Formed using two 16-bit parameters, a HI word and a LOW word. The sample rate is how often the
SDI-12 device is powered up, then interrogated for data. The value in the registers is the number of 0.010 second
counts. For example, the default value is 22,500, which calculates to a sample rate of 22500 × 0.010 seconds.
Adjusting this value affects the battery life.
•
Warmup time
. Amount of time to wait, in 0.010 second increments, from powering on the device to the time to send
communications to the device. The default value is 50, or 50 × 0.010 seconds. Adjusting this value affects the battery
life.
•
Voltage
. The default voltage setting is 6 volts or a register value of 168. Adjusting this value affects the battery life.
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DXM100-Sx Wireless Modbus Slave
22
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