Delta AHCPU500-RS2 AH Series CPU Module

Product Overview

The AHCPU500-RS2 (AHCPU500 RS2) is a high-performance, mid-range central processing unit designed for the Delta AH Series PLC system. Serving as the intelligent core for advanced industrial machinery, this module is engineered to handle complex automation tasks with a program capacity of 32K steps and an impressive execution speed of 0.1 microseconds per LD instruction. The AHCPU500-RS2 excels in multi-axis motion control and large-scale data processing, supporting up to 768 local I/O points. Its battery-free design and integrated SD card slot for data logging make it a robust and low-maintenance solution for high-end applications in the semiconductor, textile, and food processing industries.

Technical Configuration

The AHCPU500-RS2 architecture focuses on high-speed connectivity and deterministic control. It features two built-in multi-mode communication ports supporting RS-232, RS-422, and RS-485, allowing for simultaneous high-speed data exchange (up to 921.6 kbps) with HMIs, variable frequency drives, and other MODBUS-compliant devices. The module's "PLC Link" function enables automatic data exchange across a network without complex programming. For high-precision timing and event-driven tasks, the CPU supports 256 interrupts and 2,048 timers/counters. The inclusion of a Mini-USB programming port and support for all five standard IEC 61131-3 languages (LD, SFC, FBD, IL, ST) ensures maximum flexibility for international engineering teams.

Technical Specifications

Technical FAQs

Does the AHCPU500-RS2 require a battery for program retention?

No, the AHCPU500-RS2 features a battery-free design. System programs and critical data registers are stored in non-volatile memory. The Real-Time Clock (RTC) is maintained by an internal supercapacitor for up to 30 days after power is removed.

Can I expand the I/O capacity beyond the 768 local points?

The AHCPU500-RS2 is optimized for local rack control. While it supports 768 local points, for systems requiring extensive expansion across multiple backplanes or long distances, higher-tier models in the AH series or remote I/O modules via communication cards should be considered.

How does the SD card slot function in this CPU?

The SD card slot supports cards up to 2 GB and can be used for program backup, recipe storage, and historical data logging (data registers). This is particularly useful for traceability in manufacturing processes or for updating machine firmware in the field without a PC.

Engineering & Installation Guide

• Communication Mode Selection: The RS-232/422/485 ports are multi-mode. Ensure the hardware dip switches (if applicable) and software parameter settings in ISPSoft match your physical wiring. Using RS-422/485 is recommended for longer distances or high-noise environments to take advantage of the 921.6 kbps throughput.

• Thermal and Electrical Clearance: To ensure the 0.1 micro-s execution speed remains stable and the CPU does not overheat, maintain a minimum clearance of 50 mm above and below the AH series rack. Use a dedicated 24 VDC power supply for the backplane to prevent electrical noise from actuators from affecting the CPU logic.

• Firmware & Online Editing: The AHCPU500-RS2 supports online editing and debugging. When performing online edits in a running system, ensure that the changes in the logic sequence will not cause mechanical interference, as the CPU updates the process image immediately upon program download.