Send ID:
provided to complement SDI-12 protocol
a13KEYNESCOVibWire-1080001\r\n
Part Description assigned by Keynes
Address query
identifies instrument address
and commonly used on single instrument
operations only.
?!
Used to make command set SDI-12 compatible
a\r\n
Where a = number 0 - 9 for SDI-12
0 -9 letters a - z for RS485
A - Z
change Address:
used to change instrument address from default to new one for network operations
aAb!
a = initial address b = new address
b\r\n
a : b = number 0 - 9 or a - z
Start Measurement - Not Supported DT80
instruct an instrument to make measurement
aM!
a = address of instrument
a0608\r\n
instrument with address a returns 8 x vibwire & 8 x temp after 60 seconds
Concurrent measurement:
Used for polling multiple instruments on a network to start to make readings. This command frees RS-485 bus for other devices
aC!
start measurement instrument address a
a06016\r\n
initial response only after receipt of instruct and no response when data ready to be sent.
Send data
data returned
aND! = Vib + Vib + Therm + Therm
and has same format for each command
aD0! aD1! aD2! or aD3!
aD0! = channel 0 and 3 VibWire Sens
aD1! = channel 4 and 7 VibWire Sens
aD2! = channel 0 and 3 Therm/analog
aD3! = channel 4 and 7 Therm/analog
+xxxx.x+xxxx.x+xxxx.x+xxxx.x\r\n
Table Of Commands
The following commands are all those supported by the VibWire-108-SDI12 for use on the SDI-12 and 485 multi-drop serial networks.
See http://www.keynes-controls.com/vibwire/usermanualv103.pdf
for additional information on how to program and use the VibWire-108 range of interfaces
Comm Port Settings - SDI-12 & RS485 Network
Communication ports Settings for SDI-12 & RS485 network. 1200 baud 8 bit no parity
Changing the ID Number (address) under SDI-12 Commands
The following example demonstrates how to change the instrument ID number from the default factory setting 0 to 5.
Use the command ‘aAb’ where a = Start ID b = Final ID
master sends: ‘0A5’ Instrument responds 5\r\n Return New Line (5 representing new ID number)
Factory Settings
Unless otherwise specified the VibWire-108 is default factory set to ID = 0 with comm port settings 1200 baud 8 Bit no parity
8 vibrating wire sensors and 8 analogue inputs.
SDI-12 Command Summary