8VZZ000017L325 ABB H&B Contronic
CPU communication with remote units
Communication between the central units and the remote units requires no user intervention as it is carried out by a dedicated serial interface.
The dual port RAM of the central unit enables data transfer between the user program processor and the dedicated serial interface.
In the read cycle, data is taken from the remote unit and stored within the dual port RAM via the bus and dedicated serial interface, the user program processor then reads the data from the dual port RAM.
Similarly, data is transfered from the dual port RAM to the remote units via the dedicated serial interface and bus for the write cycle.
CI861
CI867K01
CI868K01-eA
CI871
CM10/200
CM572
CP435-T-ETH
CP-A RU
CPU0002
CR-M4LS
CS513
CSA463AE
CSA464AE
D-20-0-1102
D2D146-AA28-28
D674A905U01
DAI03
DAO01
DASA110
DCP10
DDI01
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