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Using a Quantum IEC Hot Standby System
840 USE 106 00 January 2003 121
Options for
Software Control
Example
Option 1
Option 2
Stage Description Comment
1 Change the setting on the Hot
Standby dialog.
To do this, you must shut down the
system and make the necessary change
in the dialog, then power up the system
again.
2 Download the new configuration.
Stage Description Comment
1 Connect Concept to your Primary
controller.
2 Call up the Reference Data Editor
(RDE).
3 Place the Hot Standby command
register and the Hot Standby status
register in the RDE.
The operating mode of controller B is
determined by the state of bit 14 of the
command register. If controller B is
offline, bit 14 is set to 0.
4 To put the controller in RUN mode,
change the state of bit 14 to 1.
Controller B immediately goes into RUN
mode.
Note: The advantage of option 2 is that the Hot Standby system does not have to be
shut down in order to change its status.