On-process Migration of C300 Controller
‘Go-Back to Idle’ option
208 Experion C300 Controller User's Guide R301.1
Honeywell 11/06
On-process Migration of C300 Controller
The Controller Migration Wizard is a software application used to migrate controllers
and other control hardware to new system firmware. See the Experion Migration User’s
Guide for more information on system migration and using the Migration wizard to
migrate C300 controllers.
‘Go-Back to Idle’ option
In Experion Release 300.1 the Controller Migration Wizard contains a ‘Go-back to Idle’
option. Go-Back to Idle allows you the option to revert to the original release firmware
before completing a controller migration on redundant controllers. For example - First,
the secondary controller of a redundant pair is migrated to new firmware. Once
completed, a switchover occurs making the controller running the new firmware the
primary controller. The operator should then conduct acceptability tests to see that the
controller is operating properly. The operator then has the option to either continue with
the controller migration of the redundant partner, or choose ‘Go-back to Idle.’ If Go-
Back to Idle is selected, a switchover will occur again making the controller running on
the base release firmware the primary controller. The controller on the new release
firmware then will be returned to operation on the base release firmware.
ATTENTION
‘Go-back to Idle’ results in a bump in control because the primary C300
(running the base release firmware) reboots into the Standby Secondary role.
While in the standby state, the secondary C300 retains a stale copy of the
primary database (from when it was in the previous primary role) and it does
not receive any synchronization updates. If ‘Go-back to Idle’ is selected,
switchover to the stale database occurs and the new primary CEE Execution
State is forced to Idle, giving you the option to manually recover from the
process bump before resuming control. See Standby state
for more
information.
ATTENTION
Any switchover trigger that occurs while the Controller Migration Wizard
presents the option for the user to ‘Go-Back to Idle’ or ‘Continue,’ will
automatically initiate Go-Back to Idle without user input.
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