56
Modbus register maps
Sample alarm status
Registers 309 and 509, sample status and buffered sample status, contain the sample
alarm status (refer to Table 20 for an example). These alarms are bit-wise mapped.
A.5 Buffered sample data
Table 21 shows the offline buffered sample record access control.
385–399 Expansion
Table 19 Sample data (continued)
Address Register description Access Size (bytes) Notes
Table 20 Register 309 sample alarm status
Address Status
0 Calibration
1Flow
2 Temperature
3 Relative humidity
4 Air velocity
5 System alarm
6 Count alarm
7 Reserved
8 Channel 1 count alarm
9 Channel 2 count alarm
10 Channel 3 count alarm
11 Channel 4 count alarm
12–15 Reserved
Table 21 Buffered sample record control
Address Register description Access Size (bytes) Data format
400 Number of buffered sample records R 2 0–1000
401 Retrieve buffered record Table 22 W21
402 Buffered record ready R 2 1 = record available
403 Erase buffer W 2 1 = start
404–499 Expansion
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