Application Scenarios

A German plastics extrusion OEM faced a recurring complaint from end-users: the fixed 15-inch Comfort Panel at the line head was fine for set-and-forget runs, but maintenance staff spent excessive time walking back and forth to acknowledge alarms or tweak zone temperatures during tool changes. The OEM’s existing architecture already used a SIMATIC IPC with WinCC Flexible Runtime as the line server. Instead of adding a second fixed panel (extra cutout, extra Profinet node, extra project engineering), the OEM bundled the 6AV6645-7AB10-0AS0​ as an optional “roaming pendant.” The panel connected via a PN Basic terminal box at the line head and roamed across the cell using a Siemens Industrial Wireless LAN access point. Operators could now carry the 6AV6645-7AB10-0AS0​ to the die zone, acknowledge alarms with the integrated acknowledgment button, jog extruder zones, and — crucially — hit the integrated E-Stop if something looked wrong, all while the actual project logic stayed resident on the IPC server. The “traffic light” operator-authorization system ensured the roaming panel and the fixed HMI never fought for control. For the OEM, the 6AV6645-7AB10-0AS0​ solved a mobility pain point with zero runtime rework; for the end-user, it shaved ~12 minutes per tool change.

Parameter

Technical Principles and Innovative Values

• Innovation Point 1: True Thin-Client HMI Architecture.​ The 6AV6645-7AB10-0AS0​ does not store the HMI project locally. All screens, tags, alarms, and recipes live on the Remote Operate Server (typically a SIMATIC IPC or a WinCC Flexible Runtime PC). The panel merely mirrors the server session, which means a single runtime license can serve multiple RO clients — a significant cost saver for multi-station layouts.
• Innovation Point 2: Traffic-Light Operator Authorization.​ In a multi-client RO setup, chaos is prevented by a built-in arbitration model. The 6AV6645-7AB10-0AS0​ displays a green/red traffic-light icon: green = view-only, red = another client holds control. Double-tapping green requests exclusive operator rights from the server. This prevents two operators from writing conflicting setpoints to the same PLC simultaneously — a subtle but critical safety-by-design feature.
• Innovation Point 3: Roaming Across Up to 10 Host Stations.​ One 6AV6645-7AB10-0AS0​ can be pre-configured with a list of up to 10 Remote Operate Servers on the same Industrial Ethernet subnet. An operator walks from Station A (extruder) to Station C (pelletizer), selects the new server from the client menu, and the same physical panel now controls a completely different runtime project — no hardware swap, no cable change.

Application Cases and Industry Value

Case 1 – Automotive Body Shop (OEM Line, Central Europe).​ A tier-1 stamping press ran six independent S7-400 cells, each with its own WinCC Flexible PC Runtime for diagnostics. Maintenance electricians previously carried laptops with WinCC Flexible Viewer to roam the 120-meter shop floor. After deploying four 6AV6645-7AB10-0AS0​ units (one per shift pair), the laptops were retired. Each RO panel was pre-listed to all six server IPs. Electricians now grab a panel at the tool crib, walk to the faulted press, select that press’s server from the RO client menu, and acknowledge alarms or force I/O from the die area. The plant reported a 22% reduction in mean-time-to-restore (MTTR) for minor faults, attributing it to “not having to drag a laptop and find a power outlet.”

Case 2 – Pharmaceutical Skid OEM (Export Machine, Asia).​ The OEM shipped a stainless skid with a SIMATIC IPC running WinCC Flexible Runtime for batch records. End-users in cleanrooms couldn’t mount a fixed HMI inside the wash-down zone, but operators needed to start/stop CIP cycles at the skid. The OEM supplied a 6AV6645-7AB10-0AS0​ with PN Basic terminal box mounted outside the wash-down boundary and a 15-meter Profinet tether to the skid. The RO panel gave operators touch access to the IPC runtime while staying outside the wet area. Validation was simpler too: since the runtime never moved, no HMI project re-validation was needed — only the RO client connection was documented.

Related Product Combination Solutions

The 6AV6645-7AB10-0AS0​ depends on a small ecosystem to function. Key companions and migration options:

• 6AV6671-5AE01-0AX0 (PN Basic Terminal Box):​ The simplest docking point — supplies 24 V DC to the panel and bridges PROFINET to the server subnet. IP65 when panel plugged in.
• 6AV6671-5AE11-0AX0 (PN Plus Terminal Box):​ Adds monitored “enable” and E-Stop circuit evaluation at the box level — the 6AV6645-7AB10-0AS0‘s integrated E-Stop chains through here.
• 6AV6645-0BE02-0AX0 (Mobile Panel 277 10″, non-RO):​ The standalone sibling that runs its own WinCC Flexible project locally — useful when you don’t have a PC runtime to lean on.
• 6AV2127-0xx (2nd-Gen Mobile Panel, 10″):​ Siemens’ official successor family (TIA Portal-based). No direct RO thin-client equivalent in Gen-2 — migration typically moves toward Sm@rtClient or a local project on the Gen-2 panel.
• 6AV6645-7AB14-0AS0 (Spare Stylus Set, 5 pcs):​ The 6AV6645-7AB10-0AS0​ ships with 2 pens; this is the factory replenishment pack.
• 6AV6645-7AB15-0AS0 (Protective Foil Kit, 10 pcs, 10″):​ Anti-scratch overlay for the 6AV6645-7AB10-0AS0​ touchscreen — wear-item in glove-heavy environments.
• SCALANCE W – Industrial WLAN Access Point:​ Needed if you want the 6AV6645-7AB10-0AS0​ to roam truly wireless across a large bay instead of tethered to one terminal box.