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SIMATIC M7-400 FM456-2 application module - 6ES7456-2AA00-0AB0

Sourced application module record for 6ES7456-2AA00-0AB0 with an explicit system role and installation unknowns.

Documented identity

Rebuilt from individual evidence

System role

Unknown: evidence limits

The cited Siemens source identifies 6ES7456-2AA00-0AB0 as SIMATIC M7-400 FM456-2 application module.

The FM456-2 processes application tasks within an M7-400 automation system.

Inferred system position: sits within the m7-400 rack between the host automation system and its configured application submodules.

Exact reference
6ES7456-2AA00-0AB0
Category
PLC / CPU
Evidence checked
2026-09-12

System role

This section explains what the product does and where it acts in the surrounding system.

Function
The FM456-2 processes application tasks within an M7-400 automation system.
System position
Inferred system position: sits within the m7-400 rack between the host automation system and its configured application submodules.
Upstream / inputs
The upstream configuration and process signals feed the application module.
Downstream / outputs
The application module sends processed values toward the downstream controller or equipment.
Limitations
Unknown: installed firmware, wiring, configuration, condition, and compatibility.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • The cited Siemens source identifies 6ES7456-2AA00-0AB0 as SIMATIC M7-400 FM456-2 application module.

    Confidence: high

  • The FM456-2 processes application tasks within an M7-400 automation system.

    Confidence: high

Inferences

  • Inferred system position: sits within the m7-400 rack between the host automation system and its configured application submodules.

    Confidence: medium

    Rationale: The exact-reference source establishes identity and the documented module family; the adjacent system path is an engineering inference.

Unknowns

  • Unknown: installed firmware, wiring, configuration, condition, and compatibility.

    Confidence: low

    Missing evidence: The individual source does not contain installation-specific records.

System position diagram

Upstream system connects through the application module to downstream equipment.

Reading limit: system position only, not a wiring or safety drawing.

Inferred system path through the application module.

Enlarged system diagram

Upstream system connects through the application module to downstream equipment.

Inferred system path through the application module.

View Mermaid source
flowchart LR; upstream[Upstream system] --> product[Product]; product --> downstream[Downstream system]
View diagram labels
Nodes
Upstream system; SIMATIC M7-400 FM456-2 application module; Downstream system
Edges
Documented or inferred system path; Processed signal path

Next action

The cited evidence supports a conservative application module record for maintenance review.

Unknown: confirm the installed firmware, wiring, configuration, condition, and compatibility before replacement or integration.

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