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Specification Sheet for Siemens SIMATIC S7-300, CPU 312C COMPACT CPU WITH MPI
Basic Information
Product Model: 6ES7312-5BD00-0AB0
Product Series: SIMATIC S7-300
CPU Type: CPU 312C COMPACT
Application Areas: Chemical, Electronics, Electrical, and other industrial automation fields
Hardware Characteristics
Integrated Interfaces: MPI interface for communication with other devices
Digital Inputs/Outputs (DI/DO):
10 Digital Inputs (DI)
6 Digital Outputs (DO)
Fast Counters: 2 high-speed counters capable of operating at up to 10 KHz
Power Supply: Integrated 24V DC power supply, accepting a voltage range of 19.2V to 28.8V
Power Protection: External protection is recommended for power supply cables
Memory Configuration
Working Memory: 16 KByte, ensuring efficient program execution
Load Memory: Micro Memory Card (MMC) required, with a maximum capacity of 8 MByte for storing user programs and data
Retentive Memory: Provides 32 KByte of retentive memory for retaining data blocks across power cycles
Programming Environment
Supported Software: STEP 7 V5.5 + SP1 or higher, or STEP 7 V5.2 + SP1 or higher (with HSP 218) for programming, configuration, and maintenance
Processing Capabilities
Bit Operation Time: Approximately 0.1 µs
Word Operation Time: Approximately 0.24 µs
Fixed-Point Arithmetic Operation Time: Approximately 0.32 µs
Floating-Point Arithmetic Operation Time: Approximately 1.1 µs
Additional Features
Program Block Quantities:
Maximum number of Data Blocks (DBs): 1024
Maximum number of Function Blocks (FBs) and Functions (FCs): 1024 (each with a maximum size of 32 KByte)
Types and quantities of Organization Blocks (OBs): Comprehensive set including OB1 (main program), OB10 (startup), OB20/21 (cyclic interrupts), OB32/33/34/35 (asynchronous errors), OB40 (synchronous errors), OB100 (warm restart), OB80/82/85/87 (hardware interrupts), OB121/122 (communication interrupts), etc.
Counters and Timers:
S7 Counters: Unlimited (limited only by RAM capacity), with retentivity for preserving counter values across power failures
S7 Timers: Unlimited (limited only by RAM capacity), with retentivity for maintaining timer settings and states during power loss
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