Siemens SIMATIC S7-300, CPU 312 6ES7312-5AC81-0AB0

Specification Sheet for Siemens SIMATIC S7-300, CPU 312 6ES7312-5AC81-0AB0

Basic Information

• Product Model: 6ES7312-5AC81-0AB0

• Product Series: SIMATIC S7-300

• CPU Type: CPU 312

• Application Areas: Designed for demanding industrial automation applications in sectors such as Chemical, Electronics, Electrical, Automotive, Machinery, and more.

Hardware Characteristics

• Integrated Interfaces:

• MPI (Multi-Point Interface) for communication with programming devices and other MPI-capable devices.

• Profinet Interface (depending on model variant, 6ES7312-5AC81-0AB0 may not include Profinet by default but can be expanded with additional modules).

• Power Supply:

• AC power supply (typically 120/230 VAC, depending on region), which is then converted internally to 24 V DC for internal use. Specific voltage range and requirements should be confirmed with the official product data.

• Power Protection: External surge protection and appropriate filtering is recommended for AC power supply lines.

• Operating Temperature Range: Typically -25°C to +60°C (depending on environmental conditions and mounting).

Storage Media and Memory Configuration

• Working Memory: Typically 32 KByte or more, depending on specific model configuration.

• Load Memory: Typically supports MultiMediaCard (MMC) or CompactFlash (CF) cards for program and data storage. Maximum capacity can vary based on the card used and firmware support.

• Retentive Memory: Available for retaining important data blocks across power cycles, size and specifics may vary.

Programming Environment

• Supported Software: STEP 7 V5.x and later versions, with the exact minimum required version depending on the firmware and additional software packages installed.

• Programming Languages: Supports Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), and Instruction List (IL).

Processing Capabilities

• Execution Speeds (approximate):

• Bit Operation Time: ~0.1 µs

• Word Operation Time: ~0.24 µs

• Fixed-Point Arithmetic Operation Time: ~0.32 µs

• Floating-Point Arithmetic Operation Time: ~1.1 µs

• Note: Actual performance can vary depending on program complexity, system load, and hardware configuration.

Additional Features

• Program Block Quantities:

• Maximum number of Data Blocks (DBs): Up to 1024 or more, depending on memory size.

• Maximum number of Function Blocks (FBs) and Functions (FCs): Up to 1024 each, with individual block sizes limited by memory availability.

• Types and quantities of Organization Blocks (OBs): Includes various system blocks for startup, error handling, interrupts, and other system functions.

• Counters and Timers:

• S7 Counters: Unlimited, limited only by available memory and program complexity.

• S7 Timers: Unlimited, with similar limitations as counters. Both counters and timers can be configured for retentivity.

• Communication Capabilities: Supports various communication protocols and interfaces for seamless integration into industrial networks.