Siemens 6ES7720-2AB10-0YB0 SIMATIC PG 720 C

A SIMATIC PG 720 C legacy programming computer with 80486 DX4/100 processing, 16 MB RAM, 540 MB storage and legacy Siemens engineering software.

System function

Rebuilt from individual evidence

System position

Evidence and limits

6ES7720-2AB10-0YB0 is identified in the source as a SIMATIC PG 720 C programming computer with an 80486 DX4/100 processor, 16 MB RAM, 540 MB hard drive, Windows 95 and STEP 5, STEP 7 and Micro DOS software in a five-language version.

Controls legacy STEP 5, STEP 7 and Micro DOS engineering tools for programming and diagnosing automation controllers.

System position: sits outside the controller station as a legacy engineering workstation, upstream of controller programming and diagnostic connections.

Unknown: The installed software license state, target controller compatibility, interface wiring and physical condition are not established by the source.

Exact reference: 6ES7720-2AB10-0YB0
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: Controls legacy STEP 5, STEP 7 and Micro DOS engineering tools for programming and diagnosing automation controllers.
System position: Sits outside the controller station as a legacy engineering workstation, upstream of controller programming and diagnostic connections.
Upstream / inputs: An engineering user and a programming connection to the target controller provide configuration inputs.
Downstream / outputs: STEP 5, STEP 7 and Micro DOS tools send programming or diagnostic actions to the target controller.
Limitations: Unknown: The installed software license state, target controller compatibility, interface wiring and physical condition are not established by the source.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

The source identifies 6ES7720-2AB10-0YB0 as a SIMATIC PG 720 C programming computer with an 80486 DX4/100 processor, 16 MB RAM, 540 MB hard drive, Windows 95 and STEP 5, STEP 7 and Micro DOS software in a five-language version.
Confidence: medium
- shop.bvs-electronics.com — retrieved 2026-09-12; medium confidence
The source documents that 6ES7720-2AB10-0YB0 provides legacy STEP 5, STEP 7 and Micro DOS engineering tools for programming and diagnosing automation controllers.
Confidence: medium
- shop.bvs-electronics.com — retrieved 2026-09-12; medium confidence

Inferences

Inference: 6ES7720-2AB10-0YB0 occupies this system position: sits outside the controller station as a legacy engineering workstation, upstream of controller programming and diagnostic connections.
Confidence: medium
Rationale: The exact-reference source documents the product identity and its interfaces, software scope or assembly relationship.
- shop.bvs-electronics.com — retrieved 2026-09-12; medium confidence

Unknowns

Unknown: The installed software license state, target controller compatibility, interface wiring and physical condition are not established by the source.
Confidence: low
Missing evidence: The listing describes the legacy workstation model, not the installed configuration or physical condition.

System position diagram

A system path places 6ES7720-2AB10-0YB0 between an upstream system and a downstream system. — The source-supported position of 6ES7720-2AB10-0YB0 connects the upstream system to the downstream system.

View Mermaid source

flowchart LR
  upstream["Upstream system"] --> product["6ES7720-2AB10-0YB0"]
  product --> downstream["Downstream system"]

View diagram labels

Nodes: Upstream system; 6ES7720-2AB10-0YB0; Downstream system
Edges: Documented signal or power path; System connection

Next action

The evidence supports a concrete system role for 6ES7720-2AB10-0YB0.

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