CiDRA Passive Sonar Transmitters - Manual (Page 40)

Table 5 Modbus Holding Registers (continued)
Address Size Type Value Description Values
4101 2 Float SENSOR_SCALE_4 Scaling factor in volts per PSI for sensor 4.
4103 2 Float SENSOR_SCALE_5 Scaling factor in volts per PSI for sensor 5.
4105 2 Float SENSOR_SCALE_6 Scaling factor in volts per PSI for sensor 6.
4107 2 Float SENSOR_SCALE_7 Scaling factor in volts per PSI for sensor 7.
4109 2 Float SENSOR_SCALE_8 Scaling factor in volts per PSI for sensor 8.
4501 2 Long OP_MODE
Sets operating mode of the transmitter. VF Mode = 0,
SOS Mode = 1, Both Mode = 2.
4503 2 Long UPDATE_RATE
This parameter will set the update rate in seconds
(nominally). Actual update rate (in seconds) can be
calculated by taking (BLOCK_SIZE / SAMPLE_FREQ) *
UPDATE_RATE (VF mode), or, (BLOCK_SIZE /
SOS_SAMPLE_FREQ) * UPDATE_RATE (SOS mode).
4505 2 Long NUM_CHANNELS
Sets number of sensors. Always leave set to 8. Do not
use this parameter to disable a sensor use
NUM_SENSORS_USED parameter to set which sensors
to use in calculations.
4507 2 Long DECIMATION Flow Decimation.
4509 2 Long WINDOW_TYPE
Algorithms always use hanning window. Windows raw
data samples of NFFT size then zero pads then
computes FFT.
4511 2 Long DETREND_FLAG
Enable/disable detrend of time series data of NFFT size
before windowing and zero padding. 0 = Do not detrend time series
data, 1 = Detrend time series data.
4513 2 Long VEL_NORM_FLAG Enable/disable normalization of sensor data.
0 = No normalization, 1 =
Normalize data. Normalization
performed in frequency domain.
4515 2 Long VEL_DIFF_FLAG Enable/disable differencing of sensors.
0 = No differencing, 1 = difference
sensors using first order
differencing. (i.e. Ch1=S1-S2*
Ch2=S2-S3...Ch7=S7-S8). 2 -
second order differencing (i.e.
Ch1=S1-2*S2+S3* Ch2=S2-
2*S3+S4...).
4517 2 Long FLOW_DIR Define flow direction. 0 = reverse flow, 1 = normal flow
20959-01 Rev 02 Page 3-25