How to Show PCS 7 MonDiL Alarms in Multiple Area Group Displays

A PCS 7 message can appear in the alarm list without appearing in an area group display if no group display is connected to the message-generating process tag or the picture hierarchy has not been recalculated. Add a WinCC Group Display object connected to the MonDiL process tag in each intended area picture, then update the OS group-display hierarchy. In the reported configuration, setting the object's display to “no” kept it hidden while its status still propagated; verify that behavior on the installed PCS 7 and WinCC release.

Why an alarm can be missing from an area summary

The message list and the group-display hierarchy serve different operator views. The Siemens PCS 7 Operator Station manuals describe a Group Display as an object that reports message status for a process tag, and describe area-level group displays as collecting status from pictures below them in the configured picture hierarchy. A message appearing in the list therefore does not by itself confirm that a tag-linked group display and the intended hierarchy path exist. The manuals cited here cover PCS 7 V7.0 SP1 and V8.0 SP1; use the matching Online Help for other releases.

Prerequisites

Identify the exact MonDiL instance that generates the message, the process picture assigned to each intended area, and the OS picture hierarchy in Picture Tree Manager. Confirm that the block is exposed as an OS process tag. The PCS 7 V7.0 SP1 manual states that a directly connected block must have S7_m_c and S7_tag system attributes set to true; confirm applicability in the installed release and block type before changing attributes. Back up the OS project and schedule any OS compile or download under the site's change-control and operating procedures.

Method 1: Add a tag-linked Group Display to the first area

Open the process picture for the area that should show the MonDiL alarm in Graphics Designer and insert a WinCC Group Display object.
In the Dynamic Wizard, select the Group Display and run the release-appropriate wizard for connecting it to a PCS 7 process tag. The PCS 7 V8.0 SP1 manual names this wizard Connect a Group Display to a PCS 7 Process Tag; the V7.0 SP1 manual uses Connect group display to PCS 7 process tag.
Select the MonDiL block instance and complete the wizard. Siemens documents that this direct connection lets the operator monitor the block's message status at runtime.
Configure the object's visual properties for the picture. In the reported setup, the object's Display property was set to no so the icon was not visible. The cited manuals establish tag linking and status display, but do not establish that exact visibility setting for every release; verify it in the applicable WinCC help and in runtime.

Method 2: Show the same alarm in a second area

Place a separate Group Display object in a process picture assigned to the second intended area and connect that object to the same MonDiL process tag. Keep each object associated with the correct picture and area in the OS picture hierarchy. This reproduces the reported configuration for routing one block's status to two area views; Siemens' general manuals document tag-linked displays and picture-hierarchy forwarding, but do not state a universal multi-area guarantee for every project arrangement. Avoid changing the alarm's area assignment merely to make it appear in another view.

Recalculate the group-display hierarchy

The picture hierarchy determines how group displays receive and forward messages to higher-level pictures. After editing the picture and hierarchy, update the group-display hierarchy using the supported OS workflow for the installed release. The PCS 7 V7.0 SP1 manual documents updating group displays when the project is downloaded, or when Picture Tree Manager data is saved with Recalculate entire group display hierarchy when saving selected. The PCS 7 V8.0 SP1 manual also documents automatic hierarchy creation through OS Project Editor's Message display tab and Create/update group displays option. Confirm the correct workflow in the installed version; do not edit generated hierarchy objects outside the documented tools.

Verification

With the OS running in a safe test or maintenance condition, generate or observe a MonDiL message using the project's approved test method. Confirm that the message appears in the message list, the first area's group display changes to the corresponding status, and the second area shows the same status if configured. Check that the hidden object remains invisible while its status still reaches the overview, and verify that the operator can navigate to the intended source picture where that behavior is configured. A successful hierarchy update alone does not prove correct runtime alarm routing.

Limitations and Operational Precautions

The ticket does not identify the PCS 7 or WinCC release, the MonDiL block version, or the exact area and picture-tree arrangement. Wizard labels and project-editor options can differ by release, so the cited V7.0 SP1 and V8.0 SP1 procedures are examples bounded to those manuals. The hidden-object behavior and successful two-area arrangement are source-reported observations, not a Siemens guarantee for all projects. Do not download OS changes or modify message-area assignments on a live system without the site's approved backup, testing, rollback, and operating plan.

Engineer FAQ

A block-linked Group Display reports the message status of the selected PCS 7 process tag. Hierarchical group displays then forward status through the configured picture hierarchy. Keep these two connections distinct: a direct tag connection identifies the source block, while picture hierarchy connections aggregate lower-level picture status.

Technical References

Siemens, SIMATIC Process Control System PCS 7, Operator Station (V8.0 SP1), Configuration Manual, sections 8.14.4.2 and 8.14.5, especially “How to interconnect a Group Display to a Process Tag” and “Picture hierarchy”: https://cache.industry.siemens.com/dl/files/026/68157026/att_109711/v1/ps7phosb_en-US.pdf?download=true
Siemens, SIMATIC Process Control System PCS 7 V7.0 SP1, Operator Station, sections 8.14.1, 8.14.5.1–8.14.5.2, on group-display function, update conditions, direct tag connection, and process-tag attributes: https://cache.industry.siemens.com/dl/files/758/27002758/att_53485/v1/ps7phosb_en-US.pdf

How to Show PCS 7 MonDiL Alarms in Multiple Area Group Displays