Siemens · PLC and HMI modules
6ES7315-2AH14-0AB0 — SIMATIC S7-300 CPU 315-2 PN/DP: fault codes, repair & supply
The 6ES7315-2AH14-0AB0 is a Siemens SIMATIC S7-300 CPU 315-2 PN/DP with PROFIBUS and PROFINET interfaces, still found on many older plants. Star Automations sources and supplies the 6ES7315-2AH14-0AB0 and repairs failed units at component level, so you can choose between a replacement and getting your existing unit restored. This is a discontinued OEM line. We source it from global surplus, and advance payment secures your delivery slot. Most quotes come back the same day — send the part number or the fault code on WhatsApp.
Common S7-300 CPU 315-2 PN/DP fault codes and what we usually find
Fault code wording can differ by firmware and manual revision — always confirm against the manual for your exact unit. The causes below are typical findings, not a diagnosis of your specific unit.
| Code | Meaning | Typical cause |
|---|---|---|
| SF (red) | System fault | Hardware or program fault; read the diagnostic buffer in STEP 7 |
| BF / BF1 / BF2 (red) | Bus fault | PROFIBUS or PROFINET cable, termination or station fault |
| DC5V (off) | Internal 5 V supply fault | Backplane supply failure or a short on the bus |
| FRCE (on) | Force job active | A force is active on an input or output |
| STOP (on) | CPU in STOP | Program stop, fault stop or manual STOP; check the diagnostic buffer |
| STOP flashing slowly | CPU requests a memory reset | Memory card missing, corrupt or program mismatch |
When a 6ES7315-2AH14-0AB0 needs attention
- CPU stuck in STOP with SF lit
- PROFIBUS or PROFINET stations dropping off
- Memory card not recognised
- CPU will not leave STOP after power-up
- Intermittent restarts or cycle-time overruns
Replace or repair your 6ES7315-2AH14-0AB0
Source a replacement
Send the part number. We check sourcing from global surplus and the OEM channel and reply the same day with availability, condition and price. Advance or verified escrow applies.
Repair your existing unit
If sourcing takes longer or you want to keep your configuration, we repair at component level — power stage, gate-drive, control and supply sections — and test before dispatch.
What people look up for the 6ES7315-2AH14-0AB0
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- S7-300 CPU SF red light
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- S7-300 memory card error
- S7-300 CPU replacement obsolete
6ES7315-2AH14-0AB0 — common questions
Can you supply the 6ES7315-2AH14-0AB0 in India?
Can a faulty 6ES7315-2AH14-0AB0 be repaired instead of replaced?
My 6ES7315-2AH14-0AB0 shows SF (red) (system fault). What should I do?
Is the exact part number important?
Need the 6ES7315-2AH14-0AB0 now?
Send the part number or fault code — we reply the same day. Serving Chennai, Puducherry, Bengaluru, Hyderabad, Delhi and pan-India.