In-Situ Aqua TROLL 400 Modbus and SDI-12 Reference Guide - Manual (Page 78)

8.37 Sensor Map Registers
8.37.1 Sensor ID Registers
These registers duplicate the Sensor ID register provided in each sensor’s Sensor Data Header
Register block. If a sensor connection is open, the probe returns a zero. If an attempt is made to
access a Sensor ID register that is not mapped to a sensor (one that exceeds the maximum
number of sensors supported by the probe), the probe will return an exception response with
error code 0x02 (illegal data address).
8.37.2 Sensor Status Register
These registers duplicate the sensor status register provided in each sensor’s Sensor Data
Header Block. If a sensor connection is open, the probe returns a zero. If an attempt is made to
access a sensor status register that is not mapped to a sensor (one that exceeds the maximum
number of sensors supported by the probe), the probe will return an exception response with
error code 0x02 (illegal data address).
8.37.3 Sensor Command Register
These registers are used to send commands to a sensor. The behavior of the sensor command
register and the commands available is different from SIS-1&2 and SIS-3. The sensor command
register is primarily used to calibrate the sensor. Failure of the command is returned in the
response exception.
If an attempt is made to access a sensor command register that is not mapped to a sensor (one
that exceeds the maximum number of sensors supported by the probe), the probe will return an
exception response with error code 0x02 (illegal data address).
ID Name Description
0xE000 Calibration Mode On Put sensor in the calibration mode.
0xE001 Calibration Update Commit new calibration to memory.
0xE002 Calibration Mode Off Put sensor in the normal operating mode.
0xE003 Restore Cal Defaults Restore factory default calibration for sensor only.
0xE004 Restore sensor defaults Restore factory defaults for calibration, parameters and
units, sentinel values, etc. for sensor only.
8.37.4 Sensor Data Register Map Version Registers
These registers specify the version of the sensor data register map pointed to by the Sensor
Data Register Offset registers. If a sensor connection is open, the probe shall return a zero. If
an attempt is made to access a sensor map version register that is not mapped to a sensor (one
that exceeds the maximum number of sensors supported by the probe), the probe will return an
exception response with error code 0x02 (illegal data address).
78