37 sensor map registers, 1 sensor id registers, 2 sensor status register – In-Situ Aqua TROLL 400 Modbus and SDI-12 Reference Guide User Manual
Page 78: 3 sensor command register, 4 sensor data register map version registers, Sensor map registers, Sensor id registers, Sensor status register, Sensor command register, Sensor data register map version registers

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).
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