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Application Scenarios:
In a high-speed packaging machine application, the 317-2AJ12 leverages its SPEED7 core to execute logic and motion control tasks with microsecond-level precision. The CPU reads high-speed encoder inputs from the main drive, calculates precise positions for the filling and sealing stations, and outputs synchronized pulses to servo drives via a PROFIBUS-DP network. Its fast processing speed ensures tight coordination between mechanical components, minimizing cycle time and maximizing throughput. In a water treatment plant, the same CPU acts as the main process controller, utilizing its PtP serial port to communicate with legacy flow meters using the Modbus RTU protocol, while the Ethernet interface connects to the plant-wide SCADA system for data logging and remote monitoring.
Parameter:
| Parameter Category | Specification Details |
|---|---|
| Manufacturer P/N | 317-2AJ12 |
| Brand / OEM | VIPA GmbH (now part of Yaskawa) |
| Product Series | System 300S / SPEED7 |
| CPU Type | CPU 317SE/DPM |
| Rated Supply Voltage | 24 V DC (20.4 – 28.8 V DC) via backplane |
| Power Consumption | Approx. 7 W (Rated current ~1.2 A) |
| Work Memory (RAM) | 2 MB integrated (1 MB program / 1 MB data), expandable to 8 MB |
| Load Memory | 8 MB integrated, supports MMC/SD card up to 1 GB |
| Processing Speed | Bit instruction: 0.01 µs; Floating-point: 0.06 µs (SPEED7 ASIC) |
| Communication Ports | X1: MPI/PROFIBUS-DP (Master, up to 12 Mbps) X2: PtP Serial (RS485, ASCII/3964R) X3: Ethernet (PG/OP, TCP/IP) MPI (Multi-Point Interface) |
| Real-Time Clock | Integrated, battery-backed (retention ≥6 weeks) |
| I/O Addressing | 8192 bytes Input / 8192 bytes Output |
| Expansion Capability | Supports up to 4 racks, 32 modules total (with SPEED-Bus) |
| Programming Software | Siemens STEP 7 (Classic, TIA Portal with HSP) or VIPA WinPLC7 |
| Operating Temperature | 0 °C to +50 °C (or +60 °C depending on version) |
| Dimensions (WxHxD) | Approx. 127 x 51 x 127 mm |
| Status | Discontinued (OBSOLETE) |
Technical Principles and Innovative Values:
- Innovation Point 1: SPEED7 RISC Architecture: The core innovation is VIPA’s proprietary SPEED7 ASIC processor, which utilizes a highly optimized RISC (Reduced Instruction Set Computer) architecture. Unlike generic microprocessors, this dedicated hardware is designed specifically for PLC instruction execution, achieving bit operation times as low as 0.01 microseconds. This provides a significant performance boost over standard S7-300 CPUs, enabling faster scan cycles and higher real-time determinism for motion control and high-speed I/O processing.
- Innovation Point 2: Hardware Compatibility with Siemens S7-300: The 317-2AJ12 is mechanically and electrically designed to be a drop-in replacement for Siemens S7-300 CPUs (like the 317-2 DP). It fits standard S7-300 rails and backplanes, allowing users to leverage existing investments in Siemens I/O modules, power supplies, and enclosures. This “clone-with-benefits” strategy drastically reduces migration costs and risks for system integrators.
- Innovation Point 3: Multi-Protocol Communication Hub: The CPU integrates three distinct communication channels (PROFIBUS-DP, PtP Serial, Ethernet) into a single module. This eliminates the need for additional communication processors (CPs) in many applications. The PtP port is particularly valuable for connecting to non-standard or legacy devices (e.g., barcode scanners, weigh scales) that use ASCII or proprietary serial protocols, while the DP master handles modern distributed I/O networks.
