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Technical Information
4.4
Communication / Modbus address
The default way of communication with the controller is by Modbus protocol. Each device on a Modbus line
needs a unique Address. All devices on one line must have the same baud rate and parity/ stop bits
configuration (
161 Baud rate, 162 Parity / Stop bits
). As a factory default the baud rate is set to 19200 baud/s,
even parity and one stop bit. If the baud rate and parity/ stop bit setup is unknown, it can be restored via the
display (see 6.2).
To set up the Modbus address by default DIP switches are used, another way to configure the address is via
a display or a Modbus Write-parameter. To activate a configuration via display/ parameter the DIP switches 1
– 6 must be set to OFF. If the Modbus address of a controller is unknown, a fall back strategy is to set the
address via the DIP-switches.
Configuration via DIP switches
The first 6 DIP switches (1
– 6) are used to set up a binary Address.
Function
DIP switch number
1 2 3 4 5 6 7 8
Modbus address 1 to 63
0 is not permitted
x
x
x
x
x
x
-
-
Table 3: Modbus DIP switches
Modbus
Address
1
2
3
4
5
6
Modbus
Address
1
2
3
4
5
6
1
On
33
On
On
2
On
34
On
On
3
On On
35
On On
On
4
On
36
On
On
5
On
On
37
On
On
On
6
On On
38
On On
On
7
On On On
39
On On On
On
8
On
40
On
On
9
On
On
41
On
On
On
10
On
On
42
On
On
On
11
On On
On
43
On On
On
On
12
On On
44
On On
On
13
On
On On
45
On
On On
On
14
On On On
46
On On On
On
15
On On On On
47
On On On On
On
16
On
48
On On
17
On
On
49
On
On On
18
On
On
50
On
On On
19
On On
On
51
On On
On On
20
On
On
52
On
On On
21
On
On
On
53
On
On
On On
22
On On
On
54
On On
On On
23
On On On
On
55
On On On
On On
24
On On
56
On On On
25
On
On On
57
On
On On On
26
On
On On
58
On
On On On
27
On On
On On
59
On On
On On On
28
On On On
60
On On On On
29
On
On On On
61
On
On On On On
30
On On On On
62
On On On On On
31
On On On On On
63
On On On On On On
32
On
Table 4: Modbus Addresses
