RedundantSequenceManager Server Service
SequenceManager
Server ServiceThe
SequenceManager
Server Service application is a SequenceManager
component for operator visualization and interaction. The SequenceManager
Server Service application makes controller data available to
the ActiveX Controls and allows the operator to command sequences. If the SequenceManager
Server Service application is not running, SequenceManager
ActiveX Control will not display data. To avoid interruptions of
operations, set up redundant SequenceManager
Server Services.Setting up redundant
SequenceManager
Server
ServicesThe
SequenceManager
Server Service must be installed on a machine that has a
FactoryTalk View Site Edition (SE) HMI Server installed. Install the SequenceManager
Server Service application on machines that are hosting a
redundant pair of FactoryTalk View SE Servers. The SequenceManager
ActiveX
Controls know the location of the SequenceManager
Server Service application
that it needs because the display in the ActiveX Control is part of a display that belongs
to a particular FactoryTalk View SE HMI Server. At runtime, the
SequenceManager
ActiveX Controls connect to the SequenceManager
Server Service application to obtain data from the controller.
If links are broken in these two places, the connection can fail: - Between the ActiveX Control and theSequenceManagerServer Service application.
- Between theSequenceManagerServer Service application and the controller.
Status properties in the ActiveX Controls display the status of both links to help diagnose communication problems.
If communication is lost (on either link between the ActiveX Control and the controller), a
timer is started. Should communications not be restored within approximately 4 minutes, the
ActiveX Control attempts to connect to the secondary
SequenceManager
Server
Service application. If the connection is successful, communications continues through the
secondary service. - Refer to FactoryTalk View SE HMI Server documentation for information on running redundantly and for details that describe architectural and configuration recommendations.
- The primary and secondarySequenceManagerServers that are on the same computers as the primary and secondary HMI Servers are configured in FactoryTalk View SE. However, the switchover optionContinue using the secondary server even when the primary server becomes available againin FactoryTalk View SE does not apply toSequenceManagerServer. TheSequenceManagerServer Service application always switches to the primary server when it becomes available.
- Use the read-only properties in the ActiveX Controls to make redundancy data available for VBA within the control:
- IsSeqMgr Server Connected: Read only property that shows whether the primarySequenceManagerserver is connected to the ActiveX control (default: 0 or False)
- IsSeqMgrServerConnectedBackup: Read only property that shows whether the backup Sequence ManagerSequenceManagerserver is connected to the ActiveX control (default: 0 or False)
- IsSeqMgrServerToControllerConnected: Read only property that shows whether the primarySequenceManagerserver is connected to the controller (default: 0 or False)
- IsSeqMgrServerToControllerConnectedBackup: Read only property that shows whether the backupSequenceManagerserver is connected to the controller (default: 0 or False)
- SeqMgrServerAddress: Read only property that shows the IP Address of the machine hosting the primarySequenceManagerServer Service. (default: 99.99.99.99)
- SeqMgrServerAddressBackup: : Read only property that shows the IP Address of the machine hosting the backupSequenceManagerServer Service. (default: 99.99.99.99)
- SeqMgrServerPortNumber: Port number of the hosting primary and backupSequenceManagerserver. (default: 7452)
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