Siemens 6ES7314-1AG14-0AB0 – CPU 314 Central Processing Unit | SIMATIC S7-300
Engineering Background
The SIMATIC S7-300 series has been the backbone of mid-range industrial automation for over two decades, deployed across automotive assembly lines, chemical processing plants, water treatment facilities, and discrete manufacturing cells worldwide. The CPU 314 (6ES7314-1AG14-0AB0) represents the proven mid-tier processing node within this platform — balancing computational throughput, memory capacity, and I/O scalability for demanding real-time control applications.
Product Positioning
Designed for procurement engineers and system integrators who require a reliable, specification-verified replacement or expansion CPU for existing S7-300 installations, the 6ES7314-1AG14-0AB0 delivers 192 KB of integrated work memory, onboard MPI/DP communication, and compatibility with the full S7-300 I/O ecosystem. It is the preferred choice when upgrading legacy CPU 313 nodes or standardizing multi-rack architectures under a single firmware baseline.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Order Number (MLFB) | 6ES7314-1AG14-0AB0 |
| Product Family | SIMATIC S7-300 |
| CPU Type | CPU 314 |
| Work Memory | 192 KB (integrated, non-expandable) |
| Load Memory | Micro SD card slot (up to 8 MB) |
| Processing Speed – Bit Operations | 0.1 µs / instruction |
| Processing Speed – Word Operations | 0.2 µs / instruction |
| Processing Speed – Floating Point | 3.0 µs / instruction |
| Digital I/O (max) | 1,024 inputs / 1,024 outputs |
| Analog I/O (max) | 256 inputs / 256 outputs |
| Communication Interface | MPI (187.5 kbps – 12 Mbps) |
| Number of MPI Nodes | Up to 32 |
| Timers / Counters | 256 / 256 |
| Data Blocks | Up to 511 DB |
| Organization Blocks | OB1, OB10–OB17, OB20–OB23, OB30–OB38, OB40–OB47, OB80–OB87, OB100–OB102, OB121, OB122 |
| Supply Voltage | DC 24 V (via backplane bus) |
| Current Consumption (5 V bus) | 1.2 A |
| Power Dissipation | 4.0 W (typical) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 10% to 95% (non-condensing) |
| Protection Class | IP20 |
| Dimensions (W × H × D) | 40 mm × 125 mm × 130 mm |
| Weight | Approx. 280 g |
| Certifications | CE, UL, cULus, ATEX Zone 2 |
| Firmware Version | V3.3.x (AG14 revision) |
| Programming Software | STEP 7 V5.x / TIA Portal (via legacy mode) |
Proven Application Environments
- Automotive Manufacturing: Body-in-white welding cells, conveyor sequencing, and press line coordination requiring deterministic cycle times under 10 ms.
- Chemical & Petrochemical: Batch reactor control, valve sequencing, and safety interlock logic in ATEX Zone 2 classified areas.
- Water & Wastewater Treatment: Pump station automation, SCADA integration via MPI-to-Ethernet gateways, and multi-rack distributed I/O architectures.
- Food & Beverage: CIP (Clean-in-Place) cycle management, filling line synchronization, and recipe-based production control.
- Building Automation & Utilities: HVAC control panels, energy metering systems, and facility management integration.
- Machine Tool & OEM Equipment: Retrofit and spare-part replacement for legacy S7-300 controlled CNC peripherals and special-purpose machines.
Engineering Advantages
- 192 KB Integrated Work Memory — Sufficient for complex ladder/FBD programs with extensive data logging without external memory dependency.
- Micro SD Load Memory — Program retention without battery; supports fast commissioning and firmware updates in the field.
- MPI Multi-Point Interface — Native peer-to-peer communication with HMI panels (TP/MP series), programming devices, and S7-300/400 CPUs on the same MPI segment.
- AG14 Revision Stability — Mature firmware baseline with resolved errata; preferred for long-lifecycle installations requiring minimal maintenance intervention.
- Full S7-300 Ecosystem Compatibility — Direct slot-in replacement for CPU 313/314 predecessors; no rack or power supply changes required.
- ATEX Zone 2 Rated — Suitable for use in potentially explosive atmospheres when installed in appropriate enclosures.
System Architecture & Signal Flow
The 6ES7314-1AG14-0AB0 mounts on the S7-300 DIN-rail profile rail and connects to the backplane bus via the integrated bus connector. The CPU occupies Slot 2 of the rack. Signal flow proceeds as follows:
- Power Supply (Slot 1) → CPU (Slot 2): DC 24 V supplied via backplane; CPU draws 1.2 A at 5 V bus.
- CPU ↔ Signal Modules (Slots 4–11): Parallel backplane bus transfers I/O data each scan cycle; cycle time configurable from 1 ms.
- MPI Port ↔ External Devices: 9-pin Sub-D connector interfaces with SIMATIC HMI, PG/PC, or additional CPUs at up to 12 Mbps.
- Micro SD Slot: Stores user program (OB/FB/FC/DB blocks) and hardware configuration; program loads automatically on power-up.
- Diagnostic Buffer: 100-entry ring buffer stores system events, fault codes, and module status for post-mortem analysis via STEP 7 or TIA Portal.
Sourcing & Quality Verification
All units supplied by Konmask.com undergo a structured incoming inspection protocol:
- Visual inspection of housing, connector pins, and label integrity (MLFB, date code, serial number cross-check).
- Power-on functional test: CPU RUN/STOP mode cycling, MPI communication handshake verification, and diagnostic buffer clear confirmation.
- Firmware version verification against Siemens product lifecycle documentation.
- Anti-static packaging with humidity indicator card; units stored in climate-controlled warehouse (18–25 °C, RH < 60%).
Units are sourced from authorized distribution channels and verified industrial surplus. Each shipment includes a test report and traceability record available upon request.
Procurement Process
- Confirm Quantity & Lead Time: Contact support@konmask.com or call +0086 19859288691 to verify real-time stock and lead time before placing large orders.
- Request Datasheet / Test Report: Available for download or by email upon request — include your order number or inquiry reference.
- Place Order: Add to cart and complete checkout. Secure payment via major credit cards, T/T bank transfer, or PayPal accepted.
- Shipping: Orders dispatched within 1–3 business days. DHL Express, FedEx, and UPS available for international shipments. Export documentation (commercial invoice, packing list, CO) provided.
- After-Sales Support: 12-month warranty against manufacturing defects. DOA (Dead on Arrival) replacement within 7 days of receipt.
Technical FAQ
Q: Is the 6ES7314-1AG14-0AB0 a direct replacement for the 6ES7314-1AG13-0AB0?
A: Yes. The AG14 revision is backward-compatible with AG13 in terms of rack slot, backplane bus, and STEP 7 hardware configuration. Firmware is not interchangeable; retain the AG14 firmware baseline.
Q: Can this CPU communicate with PROFIBUS DP slaves?
A: No. The CPU 314 (6ES7314-1AG14-0AB0) has MPI only. For PROFIBUS DP master functionality, use the CPU 315-2 DP (6ES7315-2AH14-0AB0) or add a CP 342-5 communications processor.
Q: What is the maximum program size?
A: Work memory is 192 KB. The load memory (Micro SD) can store up to 8 MB of program and data blocks, but only the portion loaded into work memory is executable.
Q: Does this CPU support PROFINET?
A: No. PROFINET requires a CPU 315-2 PN/DP or higher, or an external CP 343-1 communications processor added to the rack.
Q: Is a backup battery required?
A: No battery is required for program retention — the Micro SD card retains the program on power loss. A battery (6ES7971-1AA00-0AA0) is optional for retentive data (M, DB) during power outages.
Q: What programming software is compatible?
A: SIMATIC STEP 7 V5.4 SP5 or higher is recommended. TIA Portal V13 SP2 and above support the S7-300 family in legacy mode via the “Migrate project” function.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
