![background image](http://html.mh-extra.com/html/abb/ac-31/ac-31_technical-manual_176176.webp)
Communication
ABB Control - AC 31
Page 7-5
1SBC 260400 R1001-b
06.99
1.2. Communication configuration
MODBUS Communication, with the 40 and 50 series central units, is only allowed if the
black
07 SK 51 or 07 SK 53
cables
are used.
The serial interface of the 40 and 50 series central units have a
default
MODBUS
configuration
with the following parameters:
- Mode:
MODBUS slave 1 unit
- Transmission speed :
9 600 Bauds
- Number of stop bits :
1
- Number of data bits :
8
- Parity :
None
It is not necessary to configure the communication if your application uses these default
parameters. However, any mode change requires a software serial interface configuration:
Click on the
"Launch PLC configuration tool"
icon in the AC31GRAF software control
window
If you use the serial interface: Select the MODBUS
address from the list of the
"Communication mode"
line (see Figure 7-5)
If you use the CS31 connection: Select the MODBUS
address from the list of the
"Central
unit operative mode (CS31
MODBUS on CS31 bus)
"
line (see Figure 7-6)
Figure 7-5 : The central unit configuration window in AC31GRAF
Figure 7-6 : The central unit configuration window in AC31GRAF
A change in the speed, stop bits, data bits or parity parameters is programmed with the
SINIT
function
. The usage of the SINIT function is not necessary when communication uses the
default parameters.
The MODBUS mode remains available, even if the central unit program is stopped (the front
switch on OFF), when the black 07 SK 51 or 07 SK 53 cable is connected and the serial
interface is configured for MODBUS
communication. The programming mode for tests and
modifications becomes available when the grey 07 SK 50 or 07 SK 52 cable is used.
Summary of Contents for AC 31
Page 1: ...Technical Manual Advant Controller 31 40 50 Series 1SBC 260400 R 1001 b ...
Page 7: ......
Page 43: ......
Page 45: ...Technical specifications Page 3 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
Page 83: ......
Page 85: ...Installation Page 4 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
Page 109: ......
Page 130: ...Programming ABB Control AC 31 Page 5 21 1SBC 260400 R1001 b 06 99 ...
Page 182: ...Communication ABB Control AC 31 Page 7 11 1SBC 260400 R1001 b 06 99 ...
Page 189: ......
Page 203: ......
Page 217: ......
Page 218: ...AC 31 technical documentation ABB Control AC 31 Index Page 1 1SBC 260400 R1001 b 06 99 Index ...