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Modbus Setup
Baud rate
Data bits
Parity
Stop bits
Modbus address
Modbus Protocol
The recommended settings for multiple devices in a Modbus RTU network are 9600, 8, Even, 1. The room sensor represents 1 unit
load in a Modbus network.
Device address, baud rate, parity and stop bits can be set via:
▪
PCS10 Product Configuration Software and the the appropriate configuration cable HA011018.
The PCS10 can be downloaded free of charge from www.epluse.com/pcs10.
▪
Modbus protocol in the register 1 (0x00) and 2 (0x01).
See Application Note Modbus AN0103 (available at the according product website).
The serial number in ASCII format is located in read-only register 1 - 8 (16 bits per register). The firmware version is located in
register 9 (bit 15...8 = major release; bit 7...0 = minor release). The sensor name is located in registers 10 - 17 (16 bits per register).
Communication settings (INT16)
Parameter
Write register: function code 0x06
Modbus address
Modbus protocol settings
Device information (INT16)
Parameter
Read register: function code 0x03 / 0x04
Serial number (as ASCII)
Firmware version
Sensor name
Device status (bit decoded)
1) Register number starts from 1.
2) Protocol address starts from 0.
3) For Modbus protocol settings see Application Note Modbus AN0103 (available at the according product website).
Modbus Register Map
Parameter
Read register: function code 0x03 / 0x04
Temperature
Relative humidity RH, Uw
CO
averaged
2
CO
non-averaged
2
Dew point temperature Td
1) Register number starts from 1 and is expressed as decimal number.
2) Protocol address starts from 0 and is expressed as hexadecimal number.
It is possible to map measured value/status registers arbitrarily in a block with up to 20 registers provided for this purpose
(registers 3001...3020). Please find detailed information in the manual at the according product website.
E+E Elektronik Ges.m.b.H.
Langwiesen 7
4209 Engerwitzdorf | Austria
T +43 7235 605-0
F +43 7235 605-8
info@epluse.com
www.epluse.com
Factory settings
acc. to ordering code
8
Even
1
45
Register number
3)
Register number
FLOAT32
1)
Unit
Register
°C
1003
°F
1005
°K
1009
%RH
1021
ppm
1061
ppm
1063
°C
1105
°F
1107
°K
1147
User selectable values (via PCS10)
9 600, 19 200, 38 400, 57 600, 76 800, 115 200
8
None, odd, even
1, 2
1...247
1)
[Dec]
1
2
1)
[Dec]
1
9
10
602
INT16
2)
1)
Address
Register
Address
0x3EA
4002
0x3EC
4003
0x3F0
4005
0x3FC
4011
0x424
4031
0x426
4032
0x450
4053
0x452
4054
0x47A
4074
QG_Roomsensors | Version v1.0 | 04-2023 | Modification rights reserved | 195234
Quick Guide CDS201 | HTS201 | TES201
Register address
0x00
0x01
Register address
0x00
0x08
0x09
0x259
2)
Scale
CDS201 HTS201 TES201
0xFA1
100
0xFA2
50
0xFA4
50
0xFAA
100
0xFBE
1
0xFBF
1
0xFD4
100
0xFD5
100
0xFE9
100
2)
[Hex]
2)
[Hex]
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