Saia-Burgess Controls AG
User Manual Standby System │ Document 27-645 │ Edition ENG 02 │ 2017-04-26
Media Exchange
Diagnostic
2-8
2
2.4 Media Exchange
To communicate between CPU0 and CPU1 on each device, and between the
programs on the Primary and Secondary devices, media values can be transferred
cyclically between each CPU.
and CPU1 of the Primary and Secondary devices and the media to be transferred
between the CPU1s of the Primary and Secondary devices. Two options are
If the same program is to be used in CPU0 of both devices (Primary and Secondary),
the same in both programs.
Single symbol le
other CPUs in the ACTIVE and the STANDBY devices.
The procedure is as follows:
in “RedSymbols.sy5”, either by the user program, an S-Bus telegram, a Web
page, etc.
value before the end of the cycle, then the new value will be used instead of the
CPU0.
4. For data synchronization between the Active and Standby devices, all me-
dia values are transferred from
CPU1 of the ACTIVE device to CPU1 of the
CPU0 of the ACTIVE device.
5. All the “RedSymbols.sy5” media are cyclically transferred from CPU1 to CPU0
of the STANDBY
device. This also transfers the media values that were modi-
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