57
Modbus register maps
A.6 Buffered record block
The buffered record block (Table 22) gives a remote application the ability to access data
that is stored in the instrument. The block is continuously updated with new sample data.
Table 22 Buffered record
Address Register description Access Size (bytes) Data format
500 Buffered UTC timestamp—year R 2 YYYY (2000–9999)
501 Buffered UTC timestamp—month/day R 2 MD (1–12, 1–31)
502 Buffered UTC timestamp—hour R 2 H (0–23)
503 Buffered UTC timestamp—minute/second R 2 MS (0–59, 0–59)
504 Buffered sample period—hours R 2 H (0–23)
505 Buffered sample period—minutes/seconds R 2 MS (0–59, 0–59)
506 Reserved
507–508 Buffered sample volume R 4
509 Buffered sample status
1
R4Bitmap
511 Buffered size 1 counts R 4 0–4,294,967,29
513 Buffered size 2 counts R 4 0–4,294,967,295
515 Buffered size 3 counts R 4 0–4,294,967,295
517 Buffered size 4 counts R 4 0–4,294,967,295
519–542 Reserved
543 Analog channel 1 (flow) R 2 mV
544 Analog channel 2 (temperature) R 2 0.1 ºC external probe only
545 Analog channel 3 (relative humidity) R 2 0.1% RH external probe only
546 Analog channel 4 R 2
547 Analog channel 5 (CAL) R 2 mV
548–352 Reserved
553 Location name R 32 Double byte characters (16)
585–599 Expansion
1
Contains sample alarm status. Refer to Table 20 on page 56.
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