Saia-Burgess Controls AG
User Manual Standby System
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Document 27-645
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Edition E
NG 02
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2017-04-26
Process Data Synchronization
Diagnostic
2-7
2
Indexed Addressing
The media addresses of the synchronization data are taken from the addresses actually
used by the program. If media are accessed using the Index Register, these addresses
may not be taken into account if they are at the end of the address range. If the Index
Register is used, always ensure that the indexed addresses are within the ranges shown
in the ‘Redundancy Synchronization Data’ table. If not, define and reference an address
at or beyond the end of the indexed range, to ensure the indexed media are also trans-
ferred.