Siemens 6AV2128-3QB06-0AX1 Upgrade for SIMATIC Comfort Panel

Product Overview

Siemens 6AV2128-3QB06-0AX1 Upgrade for SIMATIC Comfort Panel: Seamless Transition to Unified HMI Architecture

Migrating from an aging SIMATIC HMI platform to the Siemens 6AV2128-3QB06-0AX1 — the SIMATIC HMI Unified Comfort Panel 15″ (MTP1500) — represents one of the most strategically sound upgrades available to industrial control system engineers today. Whether your facility is retiring legacy Comfort Panels such as the TP1500 Comfort (6AV2124-0QC02-0AX1) or transitioning from older Multi Panel or Mobile Panel platforms, the 6AV2128-3QB06-0AX1 delivers a fully compatible, future-proof replacement that minimizes engineering rework and eliminates costly downtime.

The Unified Comfort Panel series represents Siemens’ next-generation HMI architecture, built on a unified engineering framework within TIA Portal V17 and above. For plants currently running WinCC Comfort projects on legacy panels, migration is supported through the TIA Portal project migration wizard, which converts existing screen layouts, tag structures, and alarm configurations with high fidelity. This dramatically reduces the re-engineering burden for automation teams managing large-scale SCADA or distributed control environments.

From a physical installation standpoint, the 6AV2128-3QB06-0AX1 maintains a 15.6″ widescreen multi-touch display in a panel-cut-compatible form factor. Engineers migrating from the 15″ Comfort Panel generation will find that the cutout dimensions are closely aligned, reducing the need for cabinet rework. The unit mounts flush into standard control cabinet doors and supports both portrait and landscape orientations, making it adaptable to existing enclosure layouts without structural modification.

On the communication side, the 6AV2128-3QB06-0AX1 supports PROFINET, Ethernet/IP, and MPI/PROFIBUS interfaces, ensuring backward compatibility with existing S7-300, S7-400, and S7-1500 PLC backplanes. Plants running S7-300 CPUs such as the CPU 315-2 PN/DP or CPU 317-2 PN/DP can connect directly via PROFIBUS DP or PROFINET without requiring gateway hardware. For newer installations already on S7-1500 or ET 200SP distributed I/O architectures, the PROFINET interface delivers high-speed, deterministic communication with full diagnostic transparency through TIA Portal.

Power supply requirements are straightforward: the panel operates on 24 V DC, consistent with the Siemens SITOP PSU100S and SITOP PSU8600 power supply families already deployed in most SIMATIC control cabinets. No additional power conditioning is required during migration, and the existing 24 V DC rail can typically support the panel without modification.

For facilities managing distributed I/O through ET 200M or ET 200S remote I/O stations, the 6AV2128-3QB06-0AX1 integrates seamlessly into the existing network topology. Signal routing through IM 153-2 or IM 151-3 PN interface modules remains unchanged, and the HMI’s tag communication layer can be reconfigured within TIA Portal to reflect the updated device addressing without rewiring field instrumentation.

Safety-integrated plants using SIMATIC Safety controllers — such as the CPU 315F-2 PN/DP or S7-1500F series — will benefit from the Unified Comfort Panel’s native support for fail-safe visualization. Safety-relevant process values, interlocks, and emergency stop status can be displayed and acknowledged directly on the panel, reducing the need for separate safety HMI hardware and simplifying cabinet layouts in SIL 2 and SIL 3 environments.

During the commissioning phase, the panel supports USB-based project transfer and Ethernet download via TIA Portal, eliminating the need for legacy PC adapters or MPI programming cables. Existing STEP 7 projects can be imported and converted, and the panel’s onboard diagnostics provide real-time feedback on communication status, CPU connection health, and alarm queue depth — all accessible without additional engineering tools.

TOPNLMS maintains verified stock of the Siemens 6AV2128-3QB06-0AX1, sourced through authorized industrial distribution channels. Every unit undergoes pre-shipment functional verification including display integrity, touch calibration, communication port testing, and firmware version confirmation. Units are shipped in original or equivalent protective packaging with full documentation.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful migration to the 6AV2128-3QB06-0AX1 rarely involves the HMI panel alone. In most retrofit projects, the upgrade is part of a broader control system modernization that touches multiple components within the same cabinet or network segment. The SIMATIC S7-1500 CPU 1515-2 PN is frequently the controller of choice in these migrations, replacing older S7-300 or S7-400 CPUs while maintaining PROFINET connectivity to the new Unified Comfort Panel. Where distributed I/O is involved, ET 200SP HA I/O modules provide a compact, high-availability alternative to legacy ET 200M racks, and their IM 155-6 PN/2 HF interface module connects directly to the same PROFINET subnet as the HMI.

For plants retaining existing S7-300 hardware during a phased migration, the CP 343-1 Advanced communication processor enables PROFINET connectivity from legacy S7-300 racks to the new Unified panel without replacing the CPU. Similarly, the SCALANCE X208 industrial Ethernet switch is commonly added to the network topology to support the additional PROFINET devices introduced during the upgrade, providing managed switching with PROFINET diagnostics and ring redundancy support.

On the power distribution side, the SITOP PSU100S 24 V/10 A power supply is a standard companion unit in cabinets hosting the 6AV2128-3QB06-0AX1, ensuring stable 24 V DC supply with overload protection and diagnostic signaling. Where signal isolation is required between legacy field devices and the new control architecture, Phoenix Contact MINI Analog signal isolators or Siemens SITRANS signal converters are integrated inline to prevent ground loop interference during the transition period.

For projects requiring updated operator documentation and alarm management, the SIMATIC WinCC Unified Runtime license (PC-based) is often deployed in parallel with the panel to provide a redundant visualization layer, particularly in critical infrastructure environments where continuous operator visibility is mandatory during the cutover window.

Retrofit Guidance FAQ

Q: Can I reuse my existing WinCC Comfort project on the 6AV2128-3QB06-0AX1?
A: Direct reuse is not possible without migration, as the 6AV2128-3QB06-0AX1 runs WinCC Unified, a different runtime from WinCC Comfort. However, Siemens TIA Portal V17+ includes a project migration tool that converts Comfort projects to Unified format, preserving screen layouts, tag connections, and alarm configurations. Engineering time for migration is significantly reduced compared to a full rebuild, and TOPNLMS can provide pre-migration compatibility consultation upon request.

Q: Is the panel cutout compatible with my existing 15″ Comfort Panel installation?
A: The 6AV2128-3QB06-0AX1 has a panel cutout of 398 × 247 mm, which is closely aligned with the legacy TP1500 Comfort cutout of 396 × 241 mm. In most cases, minor filing or gasket adjustment is sufficient. No structural cabinet modification is required, and the mounting depth is compatible with standard 60 mm deep control cabinet doors.

Q: Does the panel support PROFIBUS DP communication with my existing S7-300 PLC?
A: Yes. The 6AV2128-3QB06-0AX1 includes an MPI/PROFIBUS DP interface (RS-485) in addition to its PROFINET ports. Existing S7-300 CPUs with DP interfaces can communicate directly with the panel without additional gateway hardware, preserving your existing PLC program and network configuration during the HMI upgrade.

Q: What is the warranty coverage and what does pre-shipment testing include?
A: All units supplied by TOPNLMS carry a 12-month warranty from the date of shipment. Pre-shipment testing includes: display pixel and backlight verification, multi-touch calibration and response testing, PROFINET and Ethernet port connectivity checks, firmware version confirmation, and visual inspection for physical integrity. Units failing any test criterion are quarantined and not shipped. Warranty claims are processed within 5 business days, with replacement units dispatched from verified stock.

Warranty Assurance

TOPNLMS provides a comprehensive 12-month warranty on the Siemens 6AV2128-3QB06-0AX1, covering hardware defects, communication port failures, display malfunctions, and touch interface degradation under normal operating conditions. Our warranty policy is designed to support industrial procurement teams who require documented quality assurance as part of their supplier qualification process.

Every unit is individually tested prior to shipment using a standardized inspection protocol that mirrors Siemens factory acceptance criteria. Test records are available upon request for quality audit purposes. Units are shipped with original firmware, and firmware version documentation is included with each shipment to support your site’s configuration management records.

For time-critical replacement scenarios — such as unplanned downtime on a production line — TOPNLMS maintains buffer stock of high-demand SIMATIC HMI models to support same-day or next-business-day dispatch. International shipments are handled via DHL Express, FedEx International Priority, or equivalent carriers, with full tracking and export documentation provided. Customs clearance support is available for shipments to the EU, Southeast Asia, the Middle East, and the Americas.

Post-sale technical support is available via email and phone for installation guidance, TIA Portal project migration questions, and communication configuration assistance. Our team includes engineers with hands-on SIMATIC HMI commissioning experience across petrochemical, power generation, water treatment, and discrete manufacturing environments.

To confirm availability, request a formal quotation, or discuss volume pricing for MRO or project procurement, contact our team directly.