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NOTICE
When reading the serial number or the sensor name, it is always necessary to read all 8 registers, even if the
desired information requires less.
NOTICE
For obtaining the correct floating point values, both registers have to be read within the same reading
cycle. The measured value can change between two Modbus requests, exponent and mantissa may get
inconsistent then.
Device settings (INT16)
Parameter
Write register: function code 0x06
Modbus address
Modbus protocol settings
ARC trigger
Device information (INT16)
Parameter
Read.register:.function.code.0x03./.0x04
Serial number sensor (as ASCII)
Firmware version
Sensor name (as ASCII)
Serial number smart probe (as
ASCII)
ARC remaining seconds
Device status
Module status
Device operating conditions
1) Register number starts from 1.
2) Protocol address starts from 0.
3) For Modbus protocol settings see Application Note Modbus AN0103 (available at www.epluse.com/hts801).
Tab. 6
HTS801 registers for device setup
For highest accuracy of RH related calculated parameters, the user can set the working pressure at the operating
point using the "process pressure" register or PCS10.
The HTS801 features a simulation mode which supports easy commissioning and enables testing of customer
data acquisition and modbus communication.
For configuration, please refer to Tab. 7 below.
Register number
3)
Register number
1)
[Dec]
1
2
509
1)
[Dec]
1
9
10
18
510
609
610
611
Humidity and Temperature Sensor for High Humidity and Chemically Polluted Conditions | 40
User Manual HTS801
2)
Register address
[Hex]
00
01
1FC
2)
Register address
[Hex]
00
08
09
11
1FD
260
261
262
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