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Program Optimization
ABB Control - AC 31
Page 6-13
1SBC 260400 R1001-b
06.99
5. Communication between central units on the CS 31 bus
The central units possess the CS 31 bus interface which may be used, just as well, as master
of the CS 31 bus or as slave of the CS 31 bus.
These configurations enable a considerable performance improvement by processing a part of
the process locally. The execution of the program is much faster and the availability of the
application is improved because a slave can continue with the partial control of the process
alone.
These configurations also enable the simplification of the conception, the setup as well as the
application maintenance by dividing the program into relatively independent parts.
5.1. CS 31 bus addressing
The configuration as, master or slave, of a central unit is effectuated in the
"Configuration
"
menu of the AC31GRAF software
"CONTROL PANEL
(see Figure 6-6).
The authorized CS 31 addresses are:
Master central unit
Slave central unit
50 series
90 series
binary
analog
binary
analog
50 series
0 to 61
0 to 61
0 to 61
0 to 5 and
8 to 15
90 series
0 to 61
0 to 5 and
8 to 15
0 to 61
0 to 5 and
8 to 15
Warning
: You have also the possibility to use the CS31 bus in Modbus
®
slave. This
configuration as Modbus
®
slave is also effectuated in the
"Configuration
" menu of the
AC31GRAF software
"CONTROL PANEL
(see Figure 6-7).
See chapter 7 communication Modbus
®
.
5.2. Communication type
A slave central unit is seen by the master central unit as a binary or analog input/output unit.
The number of data exchanged between the master and slave central units, on each CS 31
bus cycle, can be configured. This number should be adapted to the real data volume to be
transmitted in order to optimize the CS 31 bus communication times.
The maximum number for a bit configuration is 120 inputs and 120 outputs and the maximum
for an analog configuration is 8 word inputs and 8 word outputs.
This choice is made in the "
CONTROL PANEL
"
"PLC configuration tool"
menu of the
AC31GRAF software (see Figure 6-8).
Summary of Contents for AC 31
Page 1: ...Technical Manual Advant Controller 31 40 50 Series 1SBC 260400 R 1001 b ...
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Page 45: ...Technical specifications Page 3 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
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Page 85: ...Installation Page 4 2 ABB Control AC 31 1SBC 260400 R1001 b 06 99 ...
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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 ...
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Page 218: ...AC 31 technical documentation ABB Control AC 31 Index Page 1 1SBC 260400 R1001 b 06 99 Index ...