Page 5-4
MiniCapt Remote Microbial Air Sampler Operations Manual
Chapter 5 Modbus Protocol
Input Registers
30013 - 30014:
Flow Rate
Dual-register representation of the nominal flow rate in
liters per minute. Can be integer or float depending on
mode selected. The integer representation uses the scale
factor from register 30011.
30015:
Number of Particle Channels
Processed as a variable but fixed to a value of 0 for
MiniCapt.
30016:
Number of Analog Channels
Processed as a variable but fixed to a value of 3 for
MiniCapt.
30151 - 30152:
Sensor Firmware Version
Table 5-1
Input Register – Configuration
Input Registers
Description (Configuration)
Comment
Notes
30001
unary
Modbus Map Version
Version 1.00 (Static 100)
30002
unary
Sensor Firmware Version
Encoded Firmware version
30003
unary
Product Name: Char 00, 01
Product Name
30004
string
Product Name: Char 02, 03
Product Name
30005
string
Product Name: Char 04, 05
Product Name
30006
string
Product Name: Char 06, 07
Product Name
30007
string
Product Name: Char 08, 09
Product Name
30008
string
Product Name: Char 10, 11
Product Name
30009
string
Product Name: Char 12, 13
Product Name
30010
string
Product Name: Char 14, 15
Product Name
30011
unary
Scale: Flow Rate
Multiplier in fixed: Flow Rate
2 (100)
30012
unary
Scale: Volume
Multiplier in fixed: Volume
5 (100000)
30013
dual
Flow Rate (high)
Flow * 10 Scale
Float Mode
30014
dual
Flow Rate (low)
Flow * 10 Scale
Float Mode
30015
unary
Number of Particle Channels
Fixed number of sizes
0 fixed
30016
unary
Number of Analog Channels
Fixed number of analogs
3 fixed
30151
unary
Sensor Firmware Version
Revision/Build
30152
unary
Sesnor Firmware Version
Minor/Major
This is the main firmware version for the MiniCapt. Each
byte represents an element of the version as shown in