6
Signet 9900 Modbus Module
Status Register
Registers 40001 – 40002
Register.Bit
Description
40001.0
Sensor reading is Good, no errors
40001.1
Wrong Sensor Connected
40001.2
Check Sensor
40001.3
Missing Sensor
40001.4
Sensor Error
40001.5
Secondary Reading is Totalizer
40001.6
Secondary Reading not Available
40001.7
Reset to Default Jumper Active
40001.8
9900 Communication Active
40001.9
Manufacturing Area Protected
40001.10
Device using Default Communication Parameters
40001.11 – 40002.15
Not Used
Readings / Sensors
Instrument Type
Measurement Type
Reg 40007
Primary
Reg 40003
Secondary
Reg 40005
Factory
1
0x0000
NA
NA
Flow
0x4201
Flow
Totalizer
2
pH
0x5102
pH
Temperature
ORP
0x5103
ORP
Raw mV
Cond/Res
0x5704
Cond/Res
Temperature
Pressure
0x4105
Pressure
NA
Level/Volume
0x5C06
Level
Volume
Temperature
0x4007
Temperature
NA
4 to 20 mA Input
0x0008
Scaled Input
Raw mA
Salinity
0x5A09
Salinity
Temperature
Dissolved Oxygen
0x510B
Dissolved Oxygen
Temperature
Batch
No Modbus Operation in Batch Mode
1. Factory and Batch Instrument types do not update the Primary or Secondary readings.
2. Secondary readings for fl ow are only available in 9900 Generation 4 or greater transmitters.
In Generation 4 transmitters the user can set the secondary reading to be either the permanent
or resettable Totalizer.
Programming Map
Format (Byte Orders)
Floats
Register
Data
Bytes
IEEE754 Float 0x570A4318
Result 152.34
49006
0
Big Endian
40003
0x570A
C D
40004
0x4318
A B
49006
1
Little Endian
40003
0x4318
A B
40004
0x570A
C D
