Program Optimization
ABB Control - AC 31 Page 6-15
1SBC 260400 R1001-b 06.99
The program:
- On the master central unit:
%I20.00 VALUE_M00
%O20.00VALUE_FOR_SLAVE
bit reception in %I20.00
bit emission in %O20.00
- On the slave central unit at the address 20:
VALUE_FOR_SLAVE
%O00.00VALUE_M00
%I00.00
bit emission in %O00.00
bit reception in %I00.00
5.3.2. Transmission by word
Figure 6-10 : Transmission by words
The master central unit will receive the analog information from the slave central unit in the
IWxx.00 to IWxx.N inputs, (N+1) being the number of words to transmit from the slave central
unit to the master central unit.
The slave central unit will send this information through the OW00.00 to OW00.N outputs.
CU master CU slave
Address xx
CS 31 bus
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