Troubleshooting Empty Tabs and Display Behavior in the PCS 7 Technological List Editor (TLE)

In SIMATIC PCS 7 V9.0 SP1, the Technological List Editor (TLE) displays empty tabs when opening a project—even when hundreds of charts exist—because TLE is engineered strictly to display Technological Engineering Elements (Control Modules - CM, Equipment Modules - EM, and Equipment Phases - EPH) created from Technological Types (CMT/EMT). Classical SFC types and standard CFC charts instantiated directly without an enclosing technological definition do not appear in TLE tabs. Furthermore, selecting the top-level Multiproject node in the left pane leaves TLE blank. To populate TLE, select a specific project or plant hierarchy folder containing instantiated CMT/EMT objects, or use the Process Object View for classical charts.

Executive Summary

With the introduction of Advanced Process Library (APL) and technological engineering concepts in SIMATIC PCS 7, the Technological List Editor (TLE) was provided as a specialized tabular engineering environment for bulk parameterization of Control Module Types (CMT) and Equipment Module Types (EMT). A frequent point of confusion for engineers transitioning from classical PCS 7 workflows is opening TLE, waiting through a lengthy loading sequence, and finding all tabs (CM, EM, EPH) completely empty. Despite having numerous SFC types and CFC charts in the project, no data appears. This behavior is by design: TLE enforces ISA-88 type-instance semantics and ignores non-technological objects. This article explains the architectural differences between TLE and Process Object View, outlines the prerequisites for TLE population, and presents proper object classification workflows.

Architecture and Fundamental Mechanics

Technological Engineering Model, CMT/EMT Types vs Classical Blocks, and TLE Filtering Rules:

Technological Hierarchy Architecture (ISA-88 in PCS 7):
PCS 7 differentiates between Classical Engineering Objects and Technological Engineering Objects:
- Classical Objects: Standalone CFC charts, individual function blocks (e.g. MotL, VlvL), and classical SFC charts/types.
- Technological Objects: Control Modules (CM) instantiated from Control Module Types (CMT), Equipment Modules (EM) instantiated from Equipment Module Types (EMT), and Equipment Phases (EPH) instantiated from Equipment Phase Types (EPHT).
How the Technological List Editor (TLE) Operates:
TLE queries the engineering database exclusively for technological objects defined with type-instance synchronization.
When an engineer navigates to a folder containing only classical SFC instances (e.g. standalone batch sequences inside a folder named Schrittketten), TLE scans the folder, finds zero technological EM/EPH definitions, and renders the tabs empty.
Left-Pane Navigation Scope Filtering:
If an engineer highlights the top-level Multiproject root folder in SIMATIC Manager, TLE does not perform a global recursive scan across all child projects to avoid memory exhaustion in large DCS plants; it displays an empty grid.
Objects populate only when a single-user project, master data library, or specific Plant Hierarchy folder is highlighted.
Process Object View (PO View) as the Comprehensive Tool:
The Process Object View displays ALL engineering elements—both classical and technological—including blocks, parameters, signals, messages, and picture connections across the entire multiproject.

Step-by-Step Implementation Procedure

Verify Plant Hierarchy Selection in SIMATIC Manager:
* In SIMATIC Manager Plant View, ensure you do NOT have the Multiproject root highlighted.
* Click to expand a specific single project node, and select a plant hierarchy folder (e.g. Unit1 > ReactorA).
* Open the Technological List Editor from the toolbar or via Options > Technological List Editor.
Distinguish Between Classical SFCs and Equipment Modules (EM):
* Review the contents of the selected folder.
* If the sequence was created as a standalone SFC Type in CFC, it is an SFC chart, not an Equipment Module.
* To display sequences under the EM tab in TLE, create an Equipment Module Type (EMT) in the Master Data Library, embed the SFC Type within the EMT, and instantiate the EMT in the plant hierarchy.
Verify Control Module Type (CMT) Instantiation:
* Confirm that motors and valves in the project were created as Control Modules from CMT templates in the Master Data Library.
* If blocks were placed as raw CFC blocks (MotL dragged directly onto a blank chart), they are classical CFCs, not CMs, and will not populate the CM tab in TLE.
Utilize Process Object View for Classical Engineering Elements:
* For non-technological SFCs and CFC charts, switch to the Process Object View (PO View).
* Select menu View > Process Object View.
* PO View provides full visibility across all charts, parameters, signals, and messages regardless of CMT/EMT typing.

Verification

Instantiate a verified Control Module Type (CMT) into a plant hierarchy folder.
Select that folder in Plant View and launch the Technological List Editor.
Confirm that the CM tab populates immediately, displaying all control module parameters, signals, and message configurations.
Verify that modifying a parameter in TLE synchronizes with the underlying CFC instance upon saving.

Limitations and Operational Precautions

The Technological List Editor cannot be used to force-edit classical CFC block instances. Attempting to convert legacy CFC charts to CMTs requires the 'Type-Instance Synchronization' workflow in PCS 7 V9.0 or higher.

Engineer FAQ

Why is the Technological List Editor empty even though my project has charts?

TLE only displays technological objects (CM, EM, EPH) created from CMT/EMT types. Classical CFC/SFC charts are ignored.

Why does selecting the Multiproject root show empty tabs in TLE?

TLE does not scan across the entire Multiproject root to prevent performance hangs. You must select a single project or hierarchy folder.

Where can I see all classical blocks and SFCs in tabular form?

Use the Process Object View (PO View), which supports both classical and technological objects.

What is the difference between an SFC Type and an Equipment Module (EM)?

An SFC Type is a state machine block; an Equipment Module (EM) is an ISA-88 technological entity that encapsulates SFC types, control modules, and interlocks.