Setting The Profibus Address; Termination Resistors; Aplicaciones; Käyttökohteet - Grundfos CIM 1 Serie Instrucciones De Instalación Y Funcionamiento

4
5
2
1
3
Fig. 2 Connecting the Profibus
Pos. Description
1 Profibus terminal B
2 Profibus terminal A
3 Earth clamp
4 +5 VDC
5 DGND

3.2 Setting the Profibus address

The CIM 1XX Profibus module has two hexadecimal
rotary switches for setting the Profibus address.
The two switches are used for setting the four most
significant bits (SW3) and the four least significant
bits (SW4), respectively. See fig. 3.
SW3
Fig. 3 Setting the Profibus address
The table below shows examples of Profibus
address settings.
For a complete overview of Profibus addresses,
see the table on page 78.
The Profibus address must be set
decimally from 1 to 126.
Profibus address
8
20
31
126
6
SW4
SW3 SW4
0 8
1 4
1 F
7 E

3.3 Termination resistors

The termination resistors are fitted on the CIM 1XX
Profibus module. See fig. 4.
+5V
390
220
390
Fig. 4 Internal termination resistors
The CIM 1XX has a DIP switch with two switches
(SW1 and SW2) for cutting the termination resistors
in and out. Figure 5 shows the DIP switches in cut-
out state.
SW1 SW2
Fig. 5 Cutting termination resistors in and out
DIP switch settings
Status
Cut-in
Cut-out
Undefined state
To ensure a stable and reliable
communication, it is important that only the
Note
termination resistors of the first and last
units in the Profibus network are cut in.
SW1 SW2
ON ON
OFF OFF
ON OFF
OFF ON