Input Registers
Chapter 5 Modbus Protocol
MiniCapt Remote Microbial Air Sampler Operations Manual
Page 5-5
Data Section
The
Data
section contains:
• Calibration Date
• Serial Number
• Device Status
• Device State
• Number of data samples in queue
• Sample Data information
The
Data
section starts with what would have normally been considered configuration
information - calibration date and serial number. This was added to allow for a single
contiguous read when this particular information was desired along with the regular
sample data. If not desired, then start reading at register 30212.
30201:
Calibration Date (Month)
A value between 1 and 12.
30202:
Calibration Date (Day)
A value between 1 and 31.
30203:
Calibration Date (Year)
A value representing the year (e.g., 2012)
30204 - 30211:
Serial Number
Serial number entered using ASCII bytes and positioned as
shown in the map.
30212 - 30213:
Device Status
Dual-register representation of device status. Integer bit mask
matching the current coil selections for convenience. The
host can use this to check for data availability, data format,
etc while reading the data. A separate coil read would not be
required. Values are defined in
30214:
Device State
Least Significant byte (LSB) is State. Most Significant Byte
(MSB) is sub-state. Values are defined in
5-13.
