ABB REC 561 User Manual page 317

1MRK 580 150-XEN
Page 6 - 32
Apparatus control
Fig. 18 illustrates the station-wide communication. The signals not used
in the figure are removed.
The bus coupler has information for two event function blocks. But for the
two lines, one block is enough.
Besides these outputs, a valid bit is available on the command function
blocks.
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