What is the difference between Siemens Simatic KP300 Basic and KP300 Comfort?
Answer 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). KP300 Basic — Monochrome STN Display KP400 Comfort — Full-Color TFT Display 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 80,000 h Backlight MTBF (both series) 12 MB Config Memory (Comfort only) 16M Colors (Comfort TFT) 3× Interface types (Comfort) Related Questions Can I replace a KP300 Basic with a KP400 Comfort in the same panel cutout? Which Siemens Simatic KP panel is right for my automation application? How to replace a failed membrane keypad on Siemens KP300 Basic? What is the difference between KP400 Basic and KP400 Comfort? Where to buy genuine Siemens KP series replacement parts? 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.