Siemens 6ES7312-1AD10-0XB0
Siemens 6ES7312-1AD10-0XB0 – PLC-CPU's. Van Haelen supplies it refurbished, with a 24-month warranty.
Also written as: 6ES7 312-1AD10-0XB0, 6ES73121AD100XB0
The Siemens 6ES7312-1AD10-0XB0 is a S7-300 control component. When replacing, check the product version (issue) on the rating plate; for most installations the same or a higher issue is suitable. Ask us about exchange, repair and a spare-parts pool for your installation.
Available as
Product data
| Manufacturer | Siemens |
|---|
| Part number | 6ES7312-1AD10-0XB0 |
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| ETIM | EC000236 |
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Documentation from the manufacturer
Faults and fixes 6ES7312-1AD10-0XB0
Problems with 6ES7312-1AD10-0XB0: the red SF LED is on, what now?
SF means system fault: a hardware, firmware or program fault. Read the diagnostic buffer first (STEP 7 or TIA Portal: Online & diagnostics). Common causes on the S7-300: a missing or defective module in the rack, a configuration that does not match the hardware, or a diagnostic event whose organisation block (OB82, OB86, OB121, OB122) is not loaded; then the CPU also goes to STOP.
6ES7312-1AD10-0XB0: BF LED red, bus fault on PROFIBUS or PROFINET
BF (BF1/BF2 on CPUs with two interfaces) indicates a bus fault: a station that does not answer, a wrong address or device name, a broken cable or missing terminating resistors. Check the stations named in the diagnostic buffer and the cabling from the CPU first; only then suspect the CPU itself.
6ES7312-1AD10-0XB0 stays in STOP or the program is gone after a power loss
On the S7-300 the program lives on the Micro Memory Card (MMC). If the CPU stays in STOP with SF after power-up, or the program is gone: check that the MMC is inserted, makes contact and is readable. A worn or defective MMC is the most common cause; a memory reset (MRES) followed by a fresh download fixes corrupted contents, not a defective card.
6ES7312-1AD10-0XB0: DC5V LED off, CPU dead
Without the DC5V LED the CPU has no internal supply. First measure the 24 V on L+ and M and check the power supply (PS307: green LED). If the 24 V is fine and DC5V stays off, the CPU hardware is defective and replacement is the only remedy.
What do I check when replacing a 6ES7312-1AD10-0XB0?
Carry over the MMC with the program or download it again, and check the firmware version and the product version (issue, on the rating plate): the project must expect the same or a lower firmware than the replacement has. Note the PROFIBUS addresses and the PROFINET device name; you set them again on the new CPU. Keep a project backup before you start.
Fault not fixed: replace, exchange or repair the 6ES7312-1AD10-0XB0?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6ES7312-1AD10-0XB0 refurbished: tested to this family's test protocol, with a test report per serial number, with a 24-month warranty. The current lead time is shown with the condition on this page. Prefer an exchange: you get a refurbished unit straight away and return the faulty one within 14 days. Repairing your own unit is also possible: diagnosis, then a fixed price.
What information should I send for a quick diagnosis?
A photo of the rating plate (order number, product version, firmware), the exact fault code or LED state, when the fault occurs (at power-up, on enable, under load) and what you have already tried. For PLCs an export of the diagnostic buffer, for drives the parameter set. With that we can usually say the same day whether replacing, exchanging or repairing is best.
Frequently asked questions
What does refurbished mean?
Cleaned, inspected, aged or critical components replaced and tested to our test protocol for this product family. You get a 24-month warranty, a test report and a serial number label.
What should I check when replacing a 6ES7312-1AD10-0XB0?
Check the product version (issue) on the rating plate; for most installations the same or a higher issue is suitable.
Can I exchange or repair my faulty unit?
Yes. With an exchange Van Haelen supplies a refurbished unit straight away and you return the faulty one. With a repair you first get a diagnosis and then a fixed price, with test report and warranty.