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What is the difference between Siemens Simatic KP300 Basic and KP300 Comfort?
Direct Answer: There Is No "KP300 Comfort" — Here Is the Real Difference
Siemens does not manufacture a "Simatic KP300 Comfort." The KP300 model is exclusively available as a Basic (MONO PN) panel. The Comfort series in the key-operated HMI lineup begins at KP400 Comfort and extends through KP700, KP900, KP1200, and KP1500 Comfort. When customers ask about "KP300 Basic vs Comfort," the actual comparison is between the SIMATIC HMI Basic Panel family (entry-level monochrome) and the SIMATIC HMI Comfort Panel family (full-color advanced HMI).
Detailed Explanation: Basic vs Comfort Panel Architecture
1. Display Technology
The KP300 Basic uses a 3.6-inch monochrome STN display with a resolution of approximately 320 × 240 pixels. It is designed for simple text-based operator guidance, status indication, and basic machine control where color visualization is not required.
In contrast, the Comfort series (starting with KP400) features a 4.3-inch TFT color display with 16 million colors and 800 × 480 pixel resolution. This enables rich graphical interfaces, trend curves, bitmap displays, and intuitive touch-supported key operation.
2. Connectivity and Interfaces
The KP300 Basic offers RS 485 / RS 422 combined interface for basic PLC communication. It is suited for point-to-point or simple network setups.
Comfort panels include PROFINET and MPI/PROFIBUS DP interfaces in addition to RS 485/422, allowing direct integration into modern industrial Ethernet networks, multi-controller environments, and remote maintenance architectures.
3. Configuration Memory and Software Platform
KP300 Basic runs on WinCC Basic (TIA Portal) and supports a limited configuration memory — adequate for screens with basic text and a handful of process values.
Comfort panels provide 12 MB configuration memory and run Windows CE 6.0, configurable from WinCC Comfort V11 and above. This allows complex screen hierarchies, recipe management, audit trails, and data logging.
Comparison Table: KP300 Basic vs KP400 Comfort (Entry-Level Comfort)
| Feature | KP300 Basic | KP400 Comfort |
|---|---|---|
| Display Type | 3.6" Monochrome STN | 4.3" TFT, 16M colors |
| Resolution | ~320 × 240 px | 800 × 480 px |
| Backlight MTBF | 80,000 h | 80,000 h |
| PROFINET | — | |
| MPI / PROFIBUS DP | — | |
| RS 485 / RS 422 | ||
| Config Memory | Limited (Basic) | 12 MB |
| Operating System | Proprietary | Windows CE 6.0 |
| Engineering Software | WinCC Basic (TIA Portal) | WinCC Comfort (TIA Portal) |
| Data Logging | — | |
| Recipe Management | — | |
| Key Operation | Membrane Keypad | Membrane Keypad |
Real-World Case Study
Packaging Machine Upgrade at a Mid-Size Factory
A food packaging plant in Shandong, China, originally used a KP300 Basic (6AG1647-0AH11-2AX0) for simple start-stop control and fault-code display. After expanding their line with three additional stations, they needed trend visualization and multi-language operator guidance.
They upgraded to a KP900 Comfort (6AG1124-1JC01-4AX0) from VICPAS. The 800 × 480 TFT display allowed real-time production trend charts, while the PROFINET interface reduced wiring complexity across the four stations. The membrane keypad replacement from VICPAS was delivered within 48 hours and installed in under 30 minutes — no engineering modification needed because the mounting cutout and keypad layout were designed for direct swap.
Result: 23% reduction in operator error rate, simplified wiring, and full Chinese/English interface support — all on the same KP-series keypad platform they already trusted.
Replacement Parts at VICPAS
KP300 Basic Parts
- 6AG1647-0AH11-2AX0 — Membrane Keypad
- 6AG1647-0AH11-2AX1 — LCD Housing
- 6AG2647-0AH11-1AX0 — Operator Panel Keypad
- 6AV6647-0AH11-3AX0 — Membrane Switch
KP400 Comfort Parts
- 6AG1124-1DC01-4AX0 — Membrane Keypad
- 6AV2124-1DC01-0AX0 — Membrane Switch
- 6AV6647-0AJ11-3AX0 — KP400 Basic Keyboard
Key Data Points
Related Questions
Need help identifying the right KP series part for your panel? Send inquiry to VICPAS — we respond within 2 hours with a quote and stock check.
