Input Registers; Table B-1 Input Register - Configuration - Spectris Particle Measuring Systems Airnet II 4-CH Operation Manual

Appendix B : Modbus Protocol

Input Registers

The input registers are in two sections: Configuration & Data
The configuration section contains:
•
Map Version
•
Firmware Version
•
Product Name
•
Flow and Volume Scale Factors
•
Flow Rate
•
Number of channels (Particle & Analog)
•
Particle channel sizes
The scale factors are values representing the power of 10 associated with the fixed
scaling of that parameter in the map. The channel sizes are in two registers
representing integer nanometers.
The data section starts with configuration information – Calibration date and serial
number. This allows for a single contiguous read when this particular information is
desired along with the regular sample data. If not desired, then skip this section and
begin reading at register 30212.
The Device Status register contains all the Coil bits for convenience. The host can use
this to check for data availability, for example.
The Device State register is a single register in which the LSByte is a state value and the
MSByte is an associated sub-state value.
The time stamp set of registers is a "time_t" value.
The Data Packet Status is two registers for growth. 3 bits are used.
Flow Rate and Volume are in CF. These can be read either as integer values with fixed
scales or as Floats. The float mode is recommended to get best accuracy.
The location register is not utilized. It is intended for manifold systems (if applicable).
The number of channels and analogs varies across instruments by the purchased
options.
Input Registers
30001 ushort
30002 ushort
30003 string
30004 string
30005 string
30006 string
30007 string
B-2
Table B-1 Input register – configuration
Description
(Configuration)
Modbus Map Version
Sensor Firmware Version
Product Name: Char 00, 01
Product Name: Char 02, 03
Product Name: Char 04, 05
Product Name: Char 06, 07
Product Name: Char 08, 09
Comment
Version 1.00 (Static 100)
Firmware version (*100)
Serial Number
Serial Number
Serial Number
Serial Number
Serial Number
Airnet® II 4-Channel Particle Sensors Operations Manual
Input Registers
Notes