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Registers ...
Dec
Function code 0x10
6001
0x1770
6002
0x1771
6003
0x1772
6004
0x1773
6005
0x1774
6006
0x1775
6007
0x1776
6008
0x1777
6009
0x1778
Tab. 6
Custom Modbus map example
5.2.7.
Device Status Indication and Error Monitoring
Modbus
The CDS201 features a status register which contains all status and error information. It is possible to read it from
Modbus register 602 (0x259).
If a critical error occurs, all Modbus values are set to NaN (according to IEEE754 for data type FLOAT32) or to
0x8000 (INT16). Errors are displayed in bit-coded form. If an event is present, the corresponding bit is set to 1.
Measured values outside the measuring range are limited with the corresponding limit value.
... with these
assigned measurands ...
Hex
Meas.
Unit
T
°C
°C
T
°F
°F
T
K
K
RH
%
%
T
°C
RH
%
CO
raw
ppm
2
CO
raw
ppm
2
ppm
CO
avg
ppm
2
ppm
... map to registers ...
Type
Dec
Function code 0x03 / 0x04
FLOAT32
3001
FLOAT32
3002
FLOAT32
3003
FLOAT32
3004
FLOAT32
3005
FLOAT32
3006
FLOAT32
3007
FLOAT32
3008
INT16
3009
INT16
3010
INT16
3011
FLOAT32
3012
FLOAT32
3013
FLOAT32
3014
FLOAT32
3015
3016
3017
3018
3019
3020
User Manual CDS201
... mirrored from
source registers
Hex
Dec
0xBB8
1003
0xBB9
0xBBA
1005
0xBBB
0xBBC
1009
0xBBD
0xBBE
1021
0xBBF
0xBC0
4002
0xBC1
4011
0xBC2
4032
0xBC3
1063
0xBC4
0xBC5
1061
0xBC6
0xBC7
0xBC8
0xBC9
0xBCA
0xBCB
CO
, Humidity and Temperature Room Sensor | 16
2
Hex
0x3EA
0x3EC
0x3F0
0x3FC
0xFA1
0xFBE
0x426
0x424
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