Modbus addresses TOPAX® MC
40
© Lutz-Jesco GmbH 2020
BA-46020-02-V04
Multi-Channel Controller
TOPAX
®
MC
Operating instructions
Address
Read
Write
Description
Meaning
2020
x
Medium
n
1 = pH
n
2 = Redox
n
3 = Free chlorine
n
4 = Total chlorine
n
5 = Chlorine dioxide
n
6 = Bromine
n
7 = Chlorite
n
8 = Hydrogen peroxide
n
9 = Ozone
n
10 = Bromite
n
11 = Fluoride
n
12 = Salt content
n
13 = Conductivity
n
14 = Current
n
15 = Temperature
n
16 = Neutral (0 − 100%)
n
254 = Free entry
n
255 = No type
2021 − 2022
x
Measurement
Number of positions after the decimal point, see unit (4 bytes signed
int.).
2023
x
Unit
Number
Unit
decimal places
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
mA
µA
ppm
mg/l
µS/cm
mS/cm
%
mV
pH
min
s
mV/pH
Pulses/min.
Travelling unit
Celsius
2
1
2
2
2
2
2
1
2
0
0
1
0
1
1
2024
x
The assigned input of the controller
n
0 = Sensor 1
n
1 = Sensor 2
n
2 = Sensor 3
n
3 = Sensor 4
n
4 = Virtual input 1
n
5 = Virtual input 2
n
6 = Virtual input 3
n
7 = Virtual input 4
n
8 = Timer switch
2025
x
Control output Y (active control)
500 = 50,0 % (2 Byte signed int)
x
x Control output Y (only manual mode)
Tab. 29: Modbus addresses
