Instructions

UM-0085-B09 DT80 Range User Manual Page 347
RG
Note: that the value returned by the channel is the special "NotYetSet" error value (see Data Errors (P401))
The main things to check here are:
• cabling (Is the sensor powered?)
• correct
SDI12 channel number (In the above example the SDI-12 data wire should be connected to digital
input 8D)
• correct SDI-12 address (In the above example the device should have been configured for address 0)
This error message may also indicate an address conflict – a response was received from the sensor but it was garbled
because two or more sensors tried to both transmit at the same time, which will occur if they are both configured to use
the same address.
Try connecting only one sensor at a time and verifying the address of each sensor. For most sensors you can use the
following command:
SDI12SEND 8 "?!"
8SDI12: ?!1
In this case the sensor has responded, stating that it has been set to address 1. Communications may also be affected
by electrical noise or poor cable connections. If the sensor supports it, the DT80 will request that it include an error
checking code (CRC) with each data record, which the DT80 will then check. Any corruption of these messages will then
result in an error message such as:
dataTaker 80 E81 - Serial device invalid response (8SDI12:AD0:R1)
8SDI12 NotYetSet
Unsupported Functions
The other error message that you may see is:
5SDI12(R207)
dataTaker 80 E82 - Serial device data not available (5SDI12:AD0:R207)
5SDI12 NotYetSet
In this case the sensor has indicated that the requested register does not exist. The sensor either does not support
register set #2 (i.e. the a
C2! command), or that register set returns fewer than 7 values.
This error may also occur if you have requested continuous mode operation (using the CM channel option) but the sensor
does not support continuous mode, or continuous mode has not been enabled on the sensor.
Double check the sensor documentation. It may help to turn on the diagnostic messages, e.g.:
P56=2 5SDI12(R207)
5SDI12: [8] 0C2!000000
dataTaker 80 E82 - Serial device data not available (5SDI12:AD0:R207)
5SDI12 NotYetSet
In this case the sensor has returned 00000 in response to the DT80's request, indicating that no data values are
available in register set #2.