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| MODBUS ADDRESSABLE SYSTEM | GEOKON
APPENDIX C.
MODBUS ADDRESSABLE SYSTEM
C.1 MODBUS COMMUNICATIONS PARAMETERS
8:
TABLE 8:
Modbus Communications Parameters
C.2 ERROR CODES
9:
TABLE 9:
Error Codes
Note:
The sensor stores and transmits errors in binary code to compact the
information. Though unlikely, two errors could occur in one measurement cycle.
The resulting code will be the sum of the error numbers, e.g., error 4 plus error 8
appears as number 12.
Port Setting
Required Value
Bits per Second
115,200
Data bits
8
Parity
None
Stop bits
1
Flow Control
None
Number
Name
Cause
Remedy
2
Temperature Sensor
Range
Measured temperature out of range.
Thermistor may be too hot or too cold, or
it may be damaged.
Use adjacent sensors to validate or
estimate temperature.
4
Temperature Sensor
Verify
Secondary temperature sensor differed
too much from high accuracy primary
sensor.
Use adjacent sensors to validate or
estimate temperature.
8
System Reset
Unexpected interruption in prior
measurement cycle.
Ensure supply voltage is sufficient.
