Redundant Operating Characteristics - File Download/Upload Functions
Revision 19 HC900 Process Controller Installation and User Guide 159
06/14
Manual Failover
• Via Key Switch on the Redundancy Switch Module in the Redundant Controller Rack. When doing
manual failover with keyed switch, turn key to Failover and hold it there until both Reserve lights are on,
then release the key.
• Via Software Command from HC Designer & HC Utilities PC Software
• Via Software Command from Modbus / TCP & Serial Modbus RTU Hosts
• Via Software Command from OI-1042 & OI-559 Operator Interfaces
Failover Performance
Failure condition detection and failover from Lead to Reserve CPU executed in 4 analog control cycles or
less.
Redundancy Diagnostic Monitoring
• From HC Designer and HC Utilities PC Software
− Redundant System Status - current status of Lead/Reserve Controller CPU’s
− On-Line Monitoring, Controller Diagnostics, Communications Loop-Back tests
− Redundant Link Status – status of communications between Lead and Reserve controllers.
− Lead CPU status
− Reserve CPU status
− Scanner status
File Download/Upload Functions
See page 153.
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