The following figure shows how the SIS Network portion of the example layout appears in the left pane of DeltaV Diagnostics.
DOMAIN_1 is shown fully expanded, except for the logic solvers. DOMAIN_2 and DOMAIN_3 are shown collapsed. The structure not shown in these domains is very similar to that of DOMAIN_1. The physical rings do not appear in the hierarchy, but SISNet Repeaters associated with controllers appear. SISNet Repeaters are always named REPEATER01 and REPEATER02. You cannot rename them. REPEATER01 is the primary (left hand) repeater and REPEATER02 is the secondary (right hand) repeater.
Each SIS Network domain folder contains the folders Logic Solvers and Repeaters. As you select items in the hierarchy, diagnostic parameters and values for the item appear in the right pane. Many items in the SIS Network hierarchy have a context menu. The options on the menu depend on the item selected. The UNDEFINED domain contains SISNet Repeaters that are not assigned to a domain. Repeaters can appear in UNDEFINED if their controllers are not downloaded or if there are no commissioned Logic Solvers.
Duplicate Global Publishers
It is unlikely but possible under some circumstances for two different Logic Solvers that are configured as Global Publisher to be assigned to the same System Global slot. This is not allowed and is reported in the Diagnostics as follows:
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The MaintAlerts parameter on both Logic Solver reports SISNet Error.
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The P2PStatus on both Logic Solver cards reports Duplicate Global Publisher Detected.
All Secure Parameter references to the affected Logic Solvers have a status of BadConfigErr until the issue is corrected.
Two ways in which these errors can appear are:
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Two DeltaV SIS systems exist in a plant. Some of the logic solvers in each system are configured as global publishers. The fiber optic rings of the two DeltaV systems are inadvertently connected resulting in duplicate global publisher slots assigned.
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The standby logic solver of a redundant pair is powered down and the primary logic solver's configuration is changed to clear the Publish secure parameters globally check box. Another logic solver in the system is configured as a global publisher and it is assigned the slot that the redundant pair's primary logic solver had been assigned. At some later time the primary logic solver is powered down and the standby is powered back up with old configuration resulting in two logic solvers assigned the same global slot.
There may be other ways this can occur. If the MaintAlerts and P2PStatus errors listed above appear, correct your configuration as required.
To further diagnose the SIS Network, open the Repeater Connection List from the SIS Network context menu.