Overview 

Pre-Requisites 

1. iFIX 5.X redundant SCADA servers configured.
2. Historian collectors configured for redundancy. 

Testing iFIX and Historian Redundancy

• Open SCADASYNCMONITOR.exe on both secondary and Primary iFIX servers
• Check which SCADA server is ACTIVE
• Open Historian Administrator
• Check which iFIX collector is in ACTIVE status
• For this document I will assume that the Primary node is ACTIVE in both SCADASYNCMONITOR and Historian Administrator (iFIX collector)
• With SCADASYNC monitor open Enable Maintenance Mode to make the Secondary SCADA node ACTIVE
• Ensure all data is coming into iFIX
• Within Historian Administrator Select Collectors > select Secondary iFIX collector > select Redundancy Tab > Make Active Collector Now
• Navigate back to Main and ensure the Secondary collector is now Active and Primary collector is Standby
• Navigate to Tags and ensure Tags are still collecting good data
• We have now confirmed that the Secondary iFIX node should be able to run the SCADA environment and collect good Historical DATA without the Primary Node.
• Ensure Maintenance Mode is no longer enabled.

If preforming development updates

When using Maintenance Mode, the following events must occur:

• Make the secondary node the active node using the NSD fields. Wait for the iClient nodes to switch to the secondary node.
• You place the primary node into Maintenance Mode by clicking the Enable Maintenance Mode button. 
• You enter your database changes on the primary node. 
• You take the primary node out of Maintenance Mode by clicking the Disable Maintenance Mode button.
• The primary node becomes the active node. The secondary node becomes standby.
• You save your database. The databases are re-synchronized.

If preforming a simulation of SCADA failure

• To do this ensure the secondary node is still active within SCADASYNCMONITOR and Historian Administrator
• Ensure Maintenance Mode is no longer enabled.
• I.E. Primary Node is in Standby for both iFIX and Proficy Historian
• Once that is complete SHUT DOWN the secondary node.
• Within ~30 seconds the Primary SCADA node should become ACTIVE within SCADASYNCMONITOR and Historian administrator
• Check iFIX Workspace and ensure that data is populating and there are no @@@ signs.
• Check Historian Administrator > Tags to see data is collecting with a good value