Siemens 6ES7318-2AJ00-0AB0 PLC CPU Module

Description

Siemens 6ES7318-2AJ00-0AB0 PLC CPU Module

Product Dimensions：

The Siemens 6ES7318-2AJ00-0AB0 (commonly known as CPU 318-2 DP) is a legacy high-performance central processing unit belonging to the SIMATIC S7-300 PLC family. Built using S7-400 core architecture, it was historically engineered to bridge the gap between medium-scale S7-300 hardware form factors and the raw processing speed required for large-scale industrial applications.

Product Detailed Description

The CPU 318-2 DP is a high-speed controller featuring 512 KB of work memory and dual integrated communication interfaces: an MPI/DP port and a dedicated PROFIBUS DP Master/Slave interface.

It is designed to handle complex control tasks, extensive mathematical calculations, and large-scale fieldbus networks. Although installed on a standard S7-300 mounting rail, its internal architecture uses S7-400 technology, allowing high instruction execution speeds.

Technical Parameters

Product Advantages

• High Processing Power: Exceptional execution speeds for an S7-300 form factor, making it suitable for applications with heavy algorithm and data-processing demands.
• Dual PROFIBUS Connectivity: Dual ports allow simultaneous connection to a PG/HMI network and a high-speed PROFIBUS DP field network for distributed I/O (e.g., ET 200S, drives).
• Large Memory Capacity: 512 KB of work memory handles large STEP 7 user programs and data blocks without needing frequent memory optimization.
• Compact Footprint: Integrates seamlessly into standard S7-300 racks, saving cabinet space compared to a full-sized S7-400 system.

Important Considerations & Precautions

• Lifecycle Status: This module is matured / obsolete. For new installations, Siemens recommends migrating to modern platforms such as the S7-1500 series.
• Memory Card Requirement: The CPU requires an S7-400-style MC (Memory Card) for operating load memory. It does not use the MMC cards found in standard S7-300 CPUs (like CPU 315-2DP or CPU 317-2DP).
• Battery Backup: Requires a backup battery (installed in the power supply module) to retain retentive data and RAM contents during power loss.
• S7-400 Architectural Traits: Because of its S7-400 underlying architecture, certain system function blocks (SFBs/SFCs) and interrupt behaviors mirror S7-400 conventions rather than standard S7-300 units.

Product Applications

The 6ES7318-2AJ00-0AB0 is widely deployed in demanding manufacturing and process control systems:

• Automotive Manufacturing: Body shops, welding lines, and complex assembly transfer lines.
• Material Handling & Warehousing: Centralized control for high-speed sorting systems and automated storage/retrieval systems (ASRS).
• Packaging Machinery: Multi-axis motion synchronization and fast-cycle packaging lines.
• Process Automation: Water treatment systems, chemical batching, and food processing plants.

Shipping Port: Xiamen, China

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