YSI IQ SensorNet MIQ/A-MOD Module - Manual (Page 31)

MIQ/(A-)MOD Data transmission
31 ba76021e01 01/2012
Note
The counting method of the Modbus registers and Modbus bits and the
allocation of MSB and LSB is different from the usual method of most
programming languages.
MSB = Most significant bit, LSB = Least significant bit
Sensors S03
... S29
0017 ... 0232
..
.
..
.
..
.
..
.
Se
nso
r S3
0
0233 1-8 30 [= sensor number (S30)] (Int 8) 7-0
0233 9-16 Sensor status (Int 8) 7-0
0234 1-16 Sensor model (Int 16) 15-0
0235 1-16 Status info (Int 16) 15-0
0236 1-8 Measuring mode (Int 8) 7-0
0236 9-16 Measured value status (Int 8) 7-0
0237 1-16 Main measured value (IEEE-754 floating point, 32-bit) (Float 32) 31-16
0238 1-16 Main measured value (IEEE-754 floating point, 32-bit) (Float 32) 15-0
0239 1-16 Secondary meas. value (IEEE-754 floating point, 32-bit) (Float 32) 31-16
0240 1-16 Secondary meas. value (IEEE-754 floating point, 32-bit) (Float 32) 15-0
Modbus Information Data format
Register Bit Data
type Bit
Modbus Usually
Counting start of the register 1 0
MSB* allocation of the register Bit 1 Bit 15
MSB* allocation of the register Bit 16 Bit 0