31
Raw Reg holding registers, other than pulse counts, contain values less than
65000. Numbers starting from 65441 (0xFFA1) are used to represent out of
range or fault conditions. These numbers are:
65441 (0xFFA1) - Raw value is above maximum value of range
65442 (0xFFA2) - Raw value is below minimum value of range
65444 (0xFFA4) - Sensor is open circuit
65531 (0xFFFB) - No Data
65532 (0xFFFC) - Dummy
Scaling Reg holding registers use the scaling factor to represent these same
conditions. The scaling factor would normally contain a value of 0 to 4. Values
from 240 (0xF0) upwards contain the following error conditions:
240 (0xF0) - Scaled value is above the maximum value of range
241 (0xF1) - Scaled value is below the minimum value of range
242 (0xF2) - Sensor is open circuit
243 (0xF3) - No Data
244 (0xF4)
–
Dummy
11.4.2
Extra information on RC250 ModBus setup
The following parameters can be read from the RC250 for each channel:
Raw value
unsigned integer
data received by the RC250 from the
transmitter
Scaled value
signed integer
scaled value from the sensor
Scaling factor unsigned integer
number of decimal points in the Scaled
value
Battery value unsigned integer
percentage transmitter battery level (0-
100%)
Nbr Tx
unsigned integer
Tx count
Conversion from the Raw value to the scaled value uses the following formula:
Scaled value = (Raw * Span / Max Val + Min)*10^Dp
Scaling factor = Dp
The Min, Span, Max Val and Dp can be found by selecting the appropriate
channel in the Rx Configuration table and selecting Edit Channel.
