Siemens SIMATIC S7-300, CPU 312 6ES7312-5AC01-0AB0

Specification Sheet for Siemens SIMATIC S7-300, CPU 312 6ES7312-5AC01-0AB0

Basic Information

• Product Model: 6ES7312-5AC01-0AB0

• Product Series: SIMATIC S7-300

• CPU Type: CPU 312

• Application Areas: Chemical, Electronics, Electrical, and other industrial automation fields, particularly suited for medium-sized automation tasks requiring higher processing power and memory capacity.

Hardware Characteristics

• Integrated Interfaces: MPI (Multi-Point Interface) and PROFIBUS DP interface, enabling communication with other PROFIBUS devices.

• Power Supply: 24 V AC/DC universal power supply, allowing flexibility in power sources. Voltage range typically specified for AC may vary; check specific data sheet for AC voltage ranges. DC voltage range is often similar to the 6ES7312-1AE14-0AB0 model.

• Power Protection: External surge protection devices are recommended to protect against power supply fluctuations and spikes.

• Storage Media: Requires a MultiMediaCard (MMC) or CompactFlash card for program and data storage.

Memory Configuration

• Working Memory: 32 KByte, providing sufficient space for runtime data processing.

• Load Memory (MMC/CompactFlash): Maximum capacity depends on the storage media used, but typically supports large capacities up to the limit of the media, enabling storage of large programs and databases.

• Retentive Memory: Provides 32 KByte for storing data blocks that need to retain their values across power cycles.

Programming Environment

• Supported Software: STEP 7 V5.5 + SP1 or higher, offering comprehensive programming, testing, and diagnostics tools for S7-300 CPUs. Older versions like STEP 7 V5.2 + SP1 may be supported with additional hardware support packages (HSPs).

Processing Capabilities

• Bit Operation Time: Approximately 0.1 µs, enabling fast logical operations.

• Word Operation Time: Approximately 0.24 µs, suitable for basic arithmetic operations on words.

• Fixed-Point Arithmetic Operation Time: Approximately 0.32 µs, supporting efficient fixed-point calculations.

• Floating-Point Arithmetic Operation Time: Approximately 1.1 µs, enabling high-precision floating-point calculations for complex mathematical operations.

Additional Features

• Program Block Quantities:

• Maximum number of Data Blocks (DBs): 1024, allowing ample space for storing application-specific data.

• Maximum number of Function Blocks (FBs) and Functions (FCs): 1024 (each with a maximum size of 32 KByte), enabling modular programming with reusable code blocks.

• Types and quantities of Organization Blocks (OBs): Includes various OBs like OB1 (main program cycle), OB10-OB17 (interrupt routines), OB30-OB38 (error handling), OB80-OB87 (cyclic interrupts), among others, for structured program organization.

• Counters and Timers:

• S7 Counters: Unlimited (limited only by RAM capacity), supporting retentive counters that retain their values across power loss.

• S7 Timers: Unlimited (limited only by RAM capacity), with retentivity, enabling precise timing control with the ability to retain timer states across power cycles.