How to Add a Control Module Instance in PCS 7 V9.0
In PCS 7 V9.0 SP1, a Control Module (CM) is an instance based on a Control Module Type (CMT); CFC is the chart technology used for internal logic. Make the CMT available in the project Plant View/library and instantiate it in the intended hierarchy. Use the instance for exposed technological I/O and permitted parameters, keeping reusable logic in the type.
Table of Contents
- CM and CFC
- Prerequisites
- Create the Instance
- Edit at the Correct Level
- Verification
- Limitations and Operational Precautions
- Engineer FAQ
- Technical References
- Related Articles
- Related Tags
CM and CFC
A CFC chart implements internal logic. A Control Module Type (CMT) combines internal logic, technological I/Os and assignments; a Control Module (CM) is an instance of that type. CMTs support reusable type-instance engineering.
Prerequisites
Confirm CMT support and the intended type in the PCS 7 V9.0 SP1 project or master library. Back up the multiproject before changing hierarchy or shared types.
Create the Instance
- Locate the intended CMT in the master or project library.
- Make it available in the project Plant View through the CMT workflow.
- Instantiate it in the intended plant hierarchy.
- Assign exposed signals and permitted values in the Technological I/O editor.
- Compile and review type-instance consistency before download.
Edit at the Correct Level
The discussion says not to add or delete internal CFC interconnections at a CM instance. Make reusable changes in the CMT and synchronize them through the supported type-instance mechanism. Instance-specific settings are limited to exposed parameters and technological I/O assignments.
Verification
Confirm the CM references the intended CMT, appears at the correct hierarchy, has valid signal assignments and compiles. Compilation does not verify physical wiring or process behavior.
Limitations and Operational Precautions
This procedure applies to PCS 7 V9.0 SP1 context. Confirm exact menu workflow in the installed release; shared type changes can affect multiple instances. Back up and assess the affected project before download.
Engineer FAQ
What is the difference between CM and CFC? CFC is the chart technology; CM is an instance of a CMT containing logic, technological I/Os and assignments.
Where is the CMT stored? The discussion identifies the master library under Plant View; it can be made available in the project Plant View.
Can I add internal wires at an instance? The source says adding or deleting CM-instance interconnections is not allowed.
Where do reusable logic changes belong? In the CMT, followed by supported type-instance synchronization.
What can vary by instance? Exposed technological I/O assignments and eligible parameters.
Is Plant Automation Accelerator required? The discussion says no.
What does the Technological I/O editor do? It manages signals and parameters exposed for technological engineering.
Can CMTs define variants? The source describes configuring valve feedback options within one CMT.
Does compile prove field wiring? No; compare assignments with plant design.
Which version is covered? PCS 7 V9.0 SP1; confirm the exact menu workflow in that release.
Technical References
- Siemens, Control Module (CM) Technology – Efficient Engineering with SIMATIC PCS 7: https://support.industry.siemens.com/cs/attachments/109475748/109475748_PCS7_CMT_Engineering_DOC_PCS7V903_en.pdf
- Siemens, PCS 7 Compendium Part A, V9.0, section 8.2.2: https://support.industry.siemens.com/cs/attachments/109756485/pcs7_compendium_part_a_en-US_en-US.pdf