Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Product type | CPU 315-2 DP |
| Work memory | 256 kbyte, integrated; not expandable |
| Rated supply | 24 V DC; a power supply according to EN 50155 shall be used |
| Permissible supply range | 19.2 V to 28.8 V DC |
| Interfaces | 2 integrated RS 485 interfaces: MPI and PROFIBUS DP |
| PROFIBUS DP transmission rate | 12 Mbit/s max. |
| PROFIBUS DP devices | 124 max.; per station |
| Diagnostic buffer | 500 entries max.; last 100 entries retained after power failure |
Applications
- Central processing: Executes CPU program processing for the S7-300 system with support for bit, word, fixed-point, and floating-point operations.
- MPI communication: Supports PG/OP communication, routing, global data communication, S7 basic communication, and S7 communication through the integrated MPI interface.
- PROFIBUS DP communication: Operates as a PROFIBUS DP master or device and supports DPV1, equidistance, isochronous mode, SYNC/FREEZE, and direct data exchange.
- Process diagnostics: Provides process diagnostic messages, diagnostic-buffer entries, status/control variables, and forcing for inputs and outputs.
Key Features
- Central processing unit: CPU 315-2 DP with isochronous mode and CPU processing times from 0.05 μs for bit operations to 0.45 μs for floating point arithmetic.
- Memory and backup: Integrated 256 kbyte work memory, non-expandable; plug-in MMC load memory up to 8 Mbyte is supported and required.
- Supply and current: Rated supply: 24 V DC; permissible range: 19.2 V to 28.8 V. Current consumption is 850 mA rated and 150 mA typical in no-load operation.
- MPI and PROFIBUS DP: Two integrated RS 485 interfaces support MPI and PROFIBUS DP master/device operation, with transmission rates up to 187.5 kbit/s for MPI and 12 Mbit/s for PROFIBUS DP.
- Communication capacity: The CPU has 16 connections overall and supports up to 16 PROFIBUS DP master connections and 124 DP devices per station.
- Diagnostics and commissioning: A diagnostic buffer stores up to 500 entries, including the last 100 powerfail-proof entries; status/control, forcing, single-step, and 4 breakpoints are supported.
Frequently Asked Questions
1. What is the function of Siemens 6AG1315-2AH14-2AY0?
It is a SIPLUS S7-300 CPU 315-2 DP central processing unit with integrated MPI and PROFIBUS DP interfaces.
2. What supply voltage does this CPU use?
The rated supply is 24 V DC, with a permissible range from 19.2 V to 28.8 V; a power supply according to EN 50155 shall be used.
3. What memory is available and is an MMC required?
It has 256 kbyte of integrated, non-expandable work memory. Plug-in MMC load memory up to 8 Mbyte is supported, and an MMC is required.
