The Yokogawa F3SP76-7S, also cataloged as the F3SP76 Sequence CPU Module, operates as a dedicated hardware component for ultra-high-speed deterministic sequence execution within Yokogawa FA-M3 Range-free Multi-controller platforms. The processor processes basic instructions at 0.00375 us per step across a program capacity of 260K ladder steps, managing up to 8,192 local and remote I/O points via embedded Ethernet and USB 2.0 communication interfaces.
| Suffix / Option Code | Designation | Functional Execution |
|---|---|---|
| F3SP76 | Base Controller Module | High-speed PLC processor with 260K step program capacity |
| -7S | Hardware & Protocol Option | Integrates 10/100 Mbps Ethernet port, USB 2.0 maintenance interface, and SD/SDHC expansion slot |
| Parameter | Specification |
|---|---|
| Model | F3SP76-7S |
| Brand | Yokogawa Electric Corporation |
| Origin | Japan |
| Weight | 0.45 kg |
| Dimensions | 28.9 x 100 x 83.2 mm |
| Operating Temp | -20 to +55 deg C |
| Storage Temp | -40 to +70 deg C |
| Power Consumption | 460 mA at 5 VDC backplane bus |
| Basic Instruction Speed | 0.00375 us per step |
| Application Instruction Speed | 0.0075 us per step |
| Program Capacity | 260K ladder steps (520K steps project capacity) |
| Max I/O Points | 8,192 total points (local and remote combined) |
| Internal Storage Memory | Internal RAM disk, SD/SDHC card expansion slot |
| Onboard Network Ports | 1 x Ethernet (10/100 Mbps), 1 x USB 2.0 (12 Mbps) |
| Supported Protocols | TCP/IP, UDP/IP, FTP client/server, Modbus/TCP slave |
| Diagnostic System | Hardware self-test, software error log, watchdog timer |
| Compliance Standard | CE, UL certified |
The sequence CPU integrates direct 10/100 Mbps Ethernet connectivity to establish real-time deterministic communication across plant-wide control networks. Support for Modbus/TCP, FTP server/client operations, and native TCP/UDP sockets allows seamless data exchange between the FA-M3 backplane bus and higher-level DCS host stations or SCADA platforms. Operating with dual-scan task execution (achieving up to 200 us high-priority loop updates), the processor segregates fast control tasks from standard background logic execution, preventing communication overhead from degrading deterministic field scan times.
Q: How does the dual-scan control architecture prevent scan time jitter during heavy communication loads? A: The dual-scan engine isolates time-critical control tasks from standard logic execution frames. The high-speed scan updates priority I/O at deterministic intervals as short as 200 us, ensuring that network data requests or background file logging to the SD card do not disrupt critical control loops.
Q: What precautions are required when utilizing an SDHC card for offline project restoration? A: Technicians must verify that the SD/SDHC memory card uses a supported filesystem and that file transfer operations complete before removing power. Unplugging memory cards during active write sequences can corrupt backup project files or system logs stored on the card.
Insert the CPU module firmly into the designated CPU slot on the FA-M3 base rack, ensuring that top and bottom retaining clips snap securely into place to maintain solid backplane pin alignment. Connect shielded Cat5e or Cat6 industrial Ethernet cables to the front RJ-45 socket, routing communications away from high-voltage motor lines to prevent noise interference. Bond the main rack frame to the cabinet grounding system using a low-impedance copper ground strap.
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