Modbus Registers - Siemens QAM2151.040/MO Basic Documentation

Configurations
4

Modbus registers

4.3 Modbus registers
8 | 16
NOTES:
● Register 764 (Modbus address) cannot be configured as 246 via a master.
Address 246 is reserved for on-event addressing.
● Bus configuration command (768) is for on-event addressing only.
Holding Description
Register
(16-bit)
No.
1 Temperature value
2
Temperature
reliability
3
Relative humidity
value
4 Humidity reliability
5 CO value
2
6 CO reliability
2
7 IAQ value
8 IAQ reliability
212 VOC sensitive
401 System unit
1286 SW version: Major &
Minor versions
1287 SW version: Build
version
764 Modbus address
Range Unit Scaling
-327...327 °C °C 0.01
-556.6...620.6 °F °F
0 – No error - -
1 – Bad reliability,
unavailable
0...100 % % 0.01
0 – No error - -
1 – Bad reliability,
unavailable
0...2000 ppm ppm -
0 – No error - -
1 – Bad reliability,
unavailable
0...100 % % 0.01
0 – No error - -
1 – Bad reliability,
unavailable
0 – Slow - -
1 – Medium
2 - Fast
0 – Celsius - -
1 – Fahrenheit
others - invalid
value to be
discard
- - -
- - -
1...247 - -
Default R/W
- R
- R
- R
- R
- R
- R
- R
- R
1 RW
0 RW
- R
- R
1 RW
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