Keyence KV-RC8BXR Programmable Controller
The Keyence KV-RC8BXR is a high-performance programmable controller from the KV-8000 series, specifically designed for advanced motion control and multi-axis synchronization. It features a 64-bit RISC CPU with a basic instruction execution time of 1.9 ns, making it one of the fastest PLCs in its class. The controller is equipped with built-in EtherCAT master functionality, enabling high-speed real-time communication with drives, I/O, and other devices.
CPU and Processing Power
The KV-RC8BXR utilizes a 64-bit RISC processor operating at 1.2 GHz. It provides 8 MB of program memory and 1 MB of retentive data memory (non-volatile). The controller supports up to 256,000 steps of ladder logic and 128,000 points of I/O. Typical scan time for a 10K-step program is less than 1 ms. The unit also includes a built-in real-time clock (RTC) with battery backup.
Motion Control Features
The controller offers integrated motion control for up to 128 axes via EtherCAT. It supports positioning, interpolation (linear and circular), electronic cam, and registration. High-speed inputs (4 channels, 200 kHz each) can directly capture encoder feedback. The KV-RC8BXR executes motion programs (KV Motion language) concurrently with ladder logic. Synchronization jitter is less than 1 µs.
Communication Ports
1 x EtherCAT port (RJ45) for master operation (cycle time 125 µs–4 ms).
1 x Ethernet port (10/100/1000) for Modbus TCP, SLMP, and socket communication.
2 x USB 2.0 ports (Type A and mini-B) for programming and data transfer.
1 x RS-232C port (9-pin D-sub) for serial connection to HMIs or legacy devices.
I/O and Expansion
The KV-RC8BXR mounts on a KV-8000 base unit and supports expansion with KV series I/O modules (digital, analog, temperature, and high-speed counter). Up to 64 expansion modules can be connected, for a total of 1024 local I/O points. The controller can also control remote I/O via EtherCAT (up to 256 slaves).
Built-in Diagnostics and Security
The controller includes a hardware watchdog timer, self-diagnostics (CPU, memory, bus), and a battery voltage monitor. A microSD card slot (up to 32 GB) allows data logging, program backup, and firmware updates. Security features include password protection for programs and IP filtering for Ethernet access.
Environmental and Physical
Dimensions: 100 mm height x 60 mm width x 90 mm depth. Weight: 280 g. Power supply: 24V DC (20.4–28.8V), consumption 5 W. Operating temperature: 0 to 55°C; storage: -25 to 75°C. Humidity: 10% to 90% non-condensing. Protection class: IP20. The unit is UL 508, CE, and RoHS compliant.
Programming Software
Keyence KV Studio (version 9.0 or higher) supports ladder diagram, structured text, and motion SFC. The software offers online editing, real-time monitoring, and simulation. The controller can be programmed via Ethernet or USB. Built-in function blocks simplify motion control (e.g., electronic cam, registration).
Typical Applications
The KV-RC8BXR is used in high-speed packaging machines (horizontal form fill seal), pick-and-place robots, printing presses, and semiconductor handling equipment. The integrated EtherCAT reduces wiring and improves system performance.
Ordering and Documentation
Part number: KV-RC8BXR. The controller is supplied with a 24V DC power connector and an EtherCAT terminator. Manual: KV-8000 Series User's Manual (Keyence publication 168E).
