Omron C500-NC222-E 2-Axis Positioning Control Module
The Omron C500-NC222-E is a dedicated NC unit (Numerical Control) positioning module for the Omron C500 series PLC system. This module provides two axes of independent positioning control via high-speed pulse train outputs, enabling precise motion control for stepper motors and servo drives. The C500-NC222-E is designed for applications requiring accurate point-to-point positioning, including CNC machine tools, pick-and-place systems, assembly robots, packaging machinery, and indexing tables.
General Specifications
Control Axes: 2 axes (independent or interpolated operation)
Positioning Method: Pulse train output (open-collector)
Max Output Frequency: 100 kHz per axis
Positioning Range: 0 to 999,999 pulses per move
Acceleration/Deceleration: Separate programmable zones
Operating Temperature: 0°C to 55°C
Storage Temperature: -20°C to 75°C
Humidity: 10% to 90% non-condensing
Protection Rating: IP20
Positioning Control Features
The C500-NC222-E supports comprehensive positioning control capabilities. Each axis can execute independent positioning sequences with programmable target positions, speeds, and acceleration/deceleration rates. The module supports absolute positioning (movement to a specified coordinate) and incremental positioning (movement by a specified distance). Position data can be modified during operation, allowing adaptive positioning based on sensor feedback or production requirements.
Acceleration and Deceleration Control
The module features separate programmable acceleration and deceleration zones for smooth motion profiles. Trapezoidal acceleration/deceleration curves minimize mechanical shock and improve positioning accuracy, especially in high-speed applications. The acceleration rate and deceleration rate are independently programmable, allowing aggressive acceleration with gentle deceleration where required by load characteristics.
Pulse Output Specifications
Positioning commands are executed through high-speed pulse train outputs on each axis. The open-collector outputs are compatible with stepper motor drives and servo drives that accept step-and-direction signals. The maximum output frequency of 100 kHz supports high-speed positioning for applications requiring rapid traverse rates. Output format is selectable between CW/CCW (pulse + direction) or forward/reverse pulse modes to match different drive requirements.
PLC Integration and Data Transfer
The C500-NC222-E mounts directly into the C500 CPU rack or expansion I/O rack. Data and commands are transferred between the CPU and positioning module using the READ and WRITE instructions in the PLC program. Positioning data including target position, speed, acceleration rate, and start commands are written from the PLC to the module. Status information such as positioning complete, busy, and error flags are read back to the PLC for sequencing and interlocking.
Position Search and Homing
The module includes homing functions for establishing a reference position after power-up. Search directions (positive or negative limit) are programmable, with high-speed and low-speed search zones to ensure accurate reference detection. The home position can be defined at the limit switch trigger point or at an offset distance after the trigger. This homing capability is essential for absolute positioning systems that require a known starting point before executing moves.
Position Data Management
The C500-NC222-E stores positioning data in internal memory accessible by the PLC. Multiple positioning sequences can be preloaded, allowing the PLC to initiate moves by writing a single start command rather than transferring all parameters for each move. This reduces communication overhead between the CPU and positioning module, enabling faster cycle times in applications with repetitive positioning sequences.
Status and Error Indicators
The module features LED indicators for status monitoring and troubleshooting. Power and operation indicators show module readiness. Axis-specific indicators display positioning active, positioning complete, and error conditions. Error detection includes limit switch overtravel, pulse output circuit faults, and communication errors. Error codes are readable by the PLC program, enabling automated fault handling and operator notification.
Compatible PLC Systems
The C500-NC222-E is compatible with Omron C500 series CPUs including C500-CPU11-EV1, as well as larger systems such as C1000H and C2000H PLCs. The module occupies one slot in the I/O rack and is addressed through the PLC's I/O table. When used with multiple positioning modules, each is independently addressed and controlled, supporting multi-axis systems beyond two axes.
Application Examples
The C500-NC222-E is used in a variety of industrial motion control applications. In CNC machinery, it controls the X-Y positioning of cutting heads and work tables. In pick-and-place systems, it positions grippers over component feeders and placement locations. In packaging, it indexes product positions for labeling and inspection. In assembly, it positions components for insertion and fastening. The module's two-axis capability is ideal for Cartesian coordinate systems.
Mechanical Specifications
Module dimensions are 130mm (H) × 35.5mm (W) × 100mm (D), with a weight of approximately 450 grams. The housing is constructed from industrial-grade plastic with a matte finish. Terminal connections are via removable terminal blocks for easy wiring. The module includes a backplane connector for installation in the C500 rack system, requiring no external cabling for power or communication.
Standards and Compliance
The C500-NC222-E complies with UL and cUL standards for industrial control equipment. CE marking confirms conformity with European directives for electromagnetic compatibility and low voltage safety. The module is manufactured under Omron's quality management system, ensuring consistent performance and reliability.
Conclusion
The Omron C500-NC222-E 2-axis positioning module provides high-speed pulse output positioning for C500 PLC systems. With independent axis control, programmable acceleration profiles, and comprehensive homing functions, it delivers precise motion control for demanding industrial positioning applications.
