Saia-Burgess Controls AG
User Manual Standby System │ Document 27-645 │ Edition ENG 02 │ 2017-04-26
Diagnostic
2-14
2
Validation
box is closed, when certain changes are made, and before a build is done. If any
errors are found they are reported in the Messages window, and they should be
corrected before continuing.
For example:
See for a description of these er-
rors.
2.5.2 Redundant Device Conguration
-
ration includes the IP addresses of the Redundant CPU which are used by the
Primary and Secondary devices.
There is a “Redundancy” section in the PCD3.M6860-CPU1 properties:
Primary device has priority
If ‘Yes’, then the primary device will be the active device whenever possible,
and manual switchover is disabled. If ‘No’, then either device can be the active
device, and manual switchover is enabled.
Keep alive timeout (ms)
If the standby CPU1 device has not received any communications from the ac-
tive CPU1 device for this number of milliseconds, then it will assume the active
device is down or communications has failed, and will take over control by be-
coming the active device. Selectable timeouts are 100 ms, 250 ms and 500 ms.
Data Synchronization Time
The speed at which data is synchronized between the two CPU1 devices. The
time needed to transfer synchronization data will often be longer then the cycle
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