Application Scenarios
On a chocolate enrobing line commissioned in 2006, the original HMI had been an 6AV6545-0BC15-2AX0 since day one — five recipe pages for coating thickness, belt speed, and tempering setpoints, all touched by gloved operators in a cool-room environment. When the backlight finally dimmed past usable after nearly eighteen years of three-shift operation, the plant engineer’s first instinct was a full upgrade to a KP700 Basic. But the enrober’s S7-315 CPU still spoke only MPI, and rewriting the ProTool/Lite project into TIA Portal WinCC would have meant a week of offline testing plus a new cabinet cutout (the TP170B is 212 × 156 mm; the KP700 needs 214 × 158 mm but deeper clearance). Instead, they sourced a tested refurbished 6AV6545-0BC15-2AX0, backed up the existing runtime via ProSave onto a CF card, and swapped the panel during a Sunday washdown window. Total downtime: 22 minutes. The 768 KB project, the alarm buffer, the recipe CSV — all identical. For asset managers running mixed-age lines, the 6AV6545-0BC15-2AX0 isn’t obsolete; it’s the reason the line doesn’t need a six-figure controls revamp.
h2 Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 6AV6545-0BC15-2AX0 (SIMATIC TP170B Color) |
| Manufacturer | Siemens AG |
| Product Category | Touch Panel HMI (Graphics-capable) |
| Display | 5.7″ STN color, 16 colors, 320 × 240 px, resistive touch |
| Processor / OS | 32-bit RISC @ 66 MHz / Windows CE |
| User Memory | 768 KB Flash/RAM |
| Expansion | 1 × CF card slot (recipes, data logging, backup) |
| Supply Voltage | 24 V DC (0.25 A, ~7 W) |
| Interfaces | MPI/PROFIBUS DP (RS485, ≤12 Mbit/s), 2× RS232, 1× RS422/485, printer port, optional TTY |
| Configuration Software | ProTool/Lite V5.2+SP2, WinCC flexible Compact 2004+ |
| Protection / Certifications | IP65 front / IP20 rear; CE, FM Cl. I Div. 2, UL, CSA |
| Front Dimensions (W×H) | 212 × 156 mm (depth ~45 mm), cut-out 198 × 142 mm |
h2 Technical Principles and Innovative Values
Innovation Point 1: CF-Card-Based Recipe Autonomy. Unlike the smaller OP3 class, the 6AV6545-0BC15-2AX0 includes a dedicated CF card slot. On standalone machines without an MES uplink — think batch mixers, fillers, or lab-scale reactors — recipes and batch logs can be carried on a 64 MB or 128 MB CF card. Operators swap the card at shift change instead of re-keying 40 setpoint values. No PLC code change, no SCADA license, just a $15 card.
Innovation Point 2: Multi-Vendor PLC Reach Via RS422/485. The MPI/PROFIBUS port naturally talks to S7-200/300/400 and S5, but those extra RS232/RS422 ports let the 6AV6545-0BC15-2AX0 also drive third-party PLCs — Allen-Bradley MicroLogix via DF1, Mitsubishi FX via RS422, Modicon via Modbus RTU. For system integrators inheriting a mixed-brand line, this panel often becomes the “universal faceplate” that ties an S7-300 rack to a leftover Allen-Bradley zone — all on one 212 mm wide cutout.
Innovation Point 3: Glove-Friendly Resistive Touch on STN. The 5.7″ STN is only 16 colors, yes, but the resistive digitizer registers through latex, nitrile, or thin leather. In food, pharma, and cold-store environments where capacitive screens fail or require bare fingertips, the 6AV6545-0BC15-2AX0 keeps working. The 50,000-hour backlight MTBF at 25°C (~5.7 years 24/7) was class-leading when it launched, and many units in the wild are now on their second decade.
Innovation Point 4: Dual-Software Legacy Path. The 6AV6545-0BC15-2AX0 is one of the few Siemens HMIs configurable in both ProTool/Lite (the older S5/S7 generation tool) and WinCC flexible Compact (the TIA pre-cursor). That dual lineage matters: plants that never migrated from ProTool can still buy the panel new-old-stock and load their 2004 .hmi file; plants that did move to WinCC flexible can recompile the same project for a newer MLFB later without a total rewrite.
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