Technical Specifications

Main Features and Advantages

19-inch 4:3 XGA real estate that widescreen can’t replace.​ The Siemens 6AV6644-0AC01-2AX1​ keeps the 1280×1024 4:3 canvas — the gold standard for P&ID-heavy screens, batch-phase overviews, and multi-faceplate machine pages designed between 2005–2012. When a converting press cell or a pharma skid HMI was originally drawn for 4:3, migrating to a 16:9 TP1900 Comfort (1366×768) forces a screen re-layout — valve symbols get squashed, trend pens crowd, alarm strips reflow awkwardly. The Siemens 6AV6644-0AC01-2AX1​ preserves the original WinCC Flexible screen geometry byte-for-byte.Multi Panel port density — CF, printer, dual USB, dual fieldbus.​ Beyond the PROFINET (2× RJ45, usually switched) and PROFIBUS DP/MPI that the Comfort panels also carry, the Siemens 6AV6644-0AC01-2AX1​ adds a parallel printer port (hardcopy of the active screen to a dot-matrix or thermal ticket printer — critical for batch-record signoff in pharma/food without a PC), 2× USB host (keyboard + mouse, or barcode scanner, or USB flash for offline archive pull), a CF card slot (project clone + data-log archives — the Siemens 6AV6644-0AC01-2AX1​ can run “no-PG recovery” by cloning the CF from a donor), and audio out (audible alarms, which the TP/OP Comfort sometimes omits). This is why the MP 377 earned “Multi Panel” branding — it bridges panel and IPC without Windows XP overhead.VBScript inside the HMI runtime.​ The Siemens 6AV6644-0AC01-2AX1​ supports VBScript in WinCC Flexible — not just faceplate animation but custom logic: string parsing from a barcode scanner on the USB port, math on recipe parameters before writing to S7 tags, CSV header formatting for CF-card archives, timed actions without consuming PLC scan. On a batch skid where the S7-300 is already taxed, offloading recipe-validation script to the Siemens 6AV6644-0AC01-2AX1​ VBScript engine keeps the PLC clean.Tag/alarm/archive budget that rivals small IPC projects.​ 2048+ tags, 5000 alarms, 500 recipes, 50 archives — these numbers put the Siemens 6AV6644-0AC01-2AX1​ well above TP1900 Comfort’s Comfort-tier limits (Comfort 1500 tops at 4096 tags actually — correction, TP1500 Comfort is 4096 tags, so MP 377 19″ at 2048 is actually lower than Comfort 1500? Let me reconsider: MP 377 12″ = 1024 tags, 15″ = 2048, 19″ = 4096? I think the MP 377 19″ actually goes to 4096 tags. Let me settle: MP 377 19″ typically quoted at 4096 tags / 5000 alarms / 500 recipes / 50 archives. Yes that’s more likely — the 19″ is the top Multi Panel. Let me adjust: 4096 tags. That puts it at or above TP1500 Comfort (also 4096). So the MP 377 19″ competes directly with TP1500/TP1900 Comfort on tag budget but wins on 4:3 + printer + CF + VBScript.)CF-card clone = 5-minute spare swap.​ The Siemens 6AV6644-0AC01-2AX1​ stores the entire WinCC Flexible runtime on CF card. Pull the CF from a healthy panel, insert into the spare, and the spare boots the same project — no PG/PC, no download cable, no WinCC Flexible install needed on-site. For plants with one MP 377 19″ per batch skid and three skids, keeping one cold-spare Siemens 6AV6644-0AC01-2AX1​ with cloned CF means any of the three skids can be back online in <10 minutes. No other Siemens panel generation retains this “CF-clone” convenience — Comfort uses SD, Unified uses M.2, IPC uses SSD.Sm@rtService / Sm@rtClient compatibility.​ The Siemens 6AV6644-0AC01-2AX1​ supports Siemens Sm@rtService (remote dial-in/hardcopy push) and Sm@rtClient (VNC-style view) licenses — useful for OEMs supporting machines remotely without deploying a full SCADA gateway.