ABB AC 31 - Page 173

Communication
Page 7-2 ABB Control - AC 31
1SBC 260400 R1001-b 06.99
40 or 50 series
Programming
mode
A
SCII mode
MOD BU S
mode
Figure 7-1 : Communication protocols with the 40 and 50 series
40 or 50
series
MODBUS protocol
RS232 line
Figure 7-2 : Point to point connection with a PC
40 o
r
50
se
r
ies
MODBUS p
r
otocol
RS485 line
40 o
r
50
se
r
ies
40 o
r
50
se
r
ies
Figure 7-3 : Network connection with a PC
40 or 50
series
MODBUS protocol
RS485 line
40 or 50
series
40 or 50
series
Figure 7-4 : Network connection between CUs