ABB AC 31, Technical Manual

Page: 106 / 221

Installation
ABB Control - AC 31
Page 4-23
1SBC 260400 R1001-b 06.99
50
series
master
IW /
OW O IW I O I
62 63 63 64 63 64 64 Addresses
CS 31 bus
interface
RU
I O
IW/
OW
I/O
O IW/
OW
X X+1 X+1 X.00 X+2 X+3 X.04 Addresses
to to
X.03 X.07
RU I O IW I/O O OW
Addresses X+4 X+5 X+5 X+4.00 X+6 X+7 X+4.00
to to
X+4.07 X+4.07
5.3.2. Addressing slave central units
Information exchanges between a master central unit and a slave central unit isn't limited to
the exchange of physical input/output variables. It is possible to exchange a data table, whose
size may be defined in bits or words, as follows:
- bit exchange in 8 bit packets (1 byte) = from 2 bytes to 15 bytes.
Address = ( 0
≤
Y
≤
61 )
- word exchange from 1 to 8 words. Address = ( 0
≤
Y
≤
61 )
(see chapter 6 - Program Optimization).
The addressing of the slave central unit is done in the AC31GRAF software.
The addressing of the central unit extensions is independent of the CS 31 bus addressing. It is
defined and managed by the slave central unit.
X X+1 X+2 X+3 X+4 X+4 X+5 Addresses
62 63 63 64 63 64 64 Addresses
RU I I I/O I O O
CS 31
bus
interface
50
series
master
IW /
OW O IW I O I
50
series
slave
I I O IW/
OWI
I/O O
Y 63 64 63 63 65 66 Addresses managed by the
slave central unit