
Application Scenarios
In a multi-product oral-solid-dose suite, each granulation skid carries a 6AV6644-0AB01-2AX0 as the local operator faceplate. The 15-inch canvas displays a live P&ID with 40+ animated elements, a 10-step recipe grid (20 parameters per step), and a scrolling alarm buffer tied to 120+ S7-416 F-PLC tags via PROFINET. When the site IT team wanted batch records exported automatically, the integrator didn’t retrofit the PLC — they dropped a 256 MB SD card into the 6AV6644-0AB01-2AX0‘s SD slot, enabled the built-in CSV logging in WinCC Flexible, and pointed the “Batch Complete” script to write \Storage Card SD\Batch_<Lot>.csv. No PLC code changed, no SCADA license added. Two years later, when one panel’s backlight dimmed after a cleaner’s caustic overspray, the plant swapped in a tested refurbished 6AV6644-0AB01-2AX0, restored the runtime from the SD card, and was back online before the shift handover. For validation-heavy environments, that kind of “restore-from-card, same cutout, same OS” continuity is worth far more than a newer panel with a different footprint and a TIA migration project.
h2 Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 6AV6644-0AB01-2AX0 (SIMATIC MP 377 15″ Touch) |
| Manufacturer | Siemens AG |
| Product Category | Multi Panel HMI (Touch, Graphics-capable) |
| Display | 15″ TFT, 64K colors, 1024 × 768 px (SVGA), analog resistive touch |
| Configuration Memory | 12 MB (project runtime) |
| System RAM / Flash | 128 MB RAM / 128 MB Flash |
| Processor / OS | Intel x86 / Windows CE 5.0 |
| Supply Voltage / Power | 24 V DC (19.2–28.8 V), 1.9 A, ~45.6 W |
| Interfaces | 2 × RJ45 PROFINET (10/100 Mbps), 1 × RS422, 1 × RS485 (MPI/DP/PPI), 2 × USB 2.0, Line In / Mic / Line Out |
| Expansion Slots | 1 × CF card, 1 × SD/MMC (up to 128 MB) |
| Protection / Certifications | IP65 front / IP20 rear; NEMA 4, NEMA 12; CE, cULus, FM Cl. I Div. 2, EX Zone 22 |
| Mounting Cutout (W×H) | 367 × 289 mm (+1 mm), depth behind panel 105.5 mm |
| Backlight MTBF | 50,000 h @ 25°C (~5.7 yr continuous) |
h2 Technical Principles and Innovative Values
Innovation Point 1: Intel x86 + Windows CE 5.0 — A True Edge-HMI. Unlike the TP170B class (32-bit RISC, 768 KB), the 6AV6644-0AB01-2AX0 runs on an embedded Intel processor with 128 MB RAM, placing it closer to a thin client than a dumb terminal. This lets it host .NET Compact Framework 2.0 custom applications (Siemens OPP — Open Programming Package), so integrators can write C# logic that runs on the panel — barcode validation, local batch logic, or Modbus-RTU polling of a third-party weigh scale — without touching the PLC scan.
Innovation Point 2: Dual PROFINET RJ45 for Topology Flexibility. Most mid-tier HMIs have one Ethernet port; the 6AV6644-0AB01-2AX0 has two. One port lands on the machine-level PROFINET IO ring (alongside the S7-400F and drives), while the second can uplink to the plant MES/IT network or a remote service VPN via Sm@rtService. The HMI acts as a pass-through-aware gateway without needing an extra CP module in the cabinet.
Innovation Point 3: Dual Removable Storage + Battery-Backed RTC. Between the CF slot and SD/MMC slot, plus a battery-backed hardware clock, the 6AV6644-0AB01-2AX0 keeps its non-volatile alarm buffer and recipe CSVs even on power loss. For FDA 21 CFR Part 11–lite environments (batch ID, timestamp, operator acknowledgment), this combination means the panel itself is the audit trail — no SQL server required.
Innovation Point 4: Multimedia-Native for Operator Training. The MP 377 image ships with Windows Media Player and Internet Explorer 6.0 Pocket PC. On slow-shift lines, the 6AV6644-0AB01-2AX0 can loop a 30-second “how to purge the hopper” WMV on the idle screen, driven from the CF card. It sounds trivial until you realize how many OEMs fly a tech out for a 10-minute “show the operator the sequence” visit — the panel does it for free.
Innovation Point 5: MP 370 15″ Cutout Compatibility. The 6AV6644-0AB01-2AX0 was designed as a drop-in performance upgrade for the earlier MP 370 15″ Touch — same 367 × 289 mm cutout, same four rear clamps, same 24V supply. Plants sitting on MP 370 hardware (now truly ancient) can step up to MP 377 without cutting the door, gaining CF/SD, dual PROFINET, and WinCE 5.0 in the bargain.







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