All LEDs CPU319F blink

When operating CPU319F-3 DP / PN fails in his work. The result of this failure is to disable the processing of the control program and disable all outputs. In this front panel PLC occurs simultaneously all the LEDs blink.

Moreover, this situation may occur once in several days or several times a day.

After switching off and switching on power, PLC loads and works fine until the next failure.

Replacing the Firmware to the latest (6ES7318-3FL01-0AB0_V3213.zip), downloaded from the official site Siemens, the replacement of MMC cards on the same new one, CPU power connection to another source of power is not the result given.

Please tell me what could be wrong?

Hi,

Please check earthing and power supply regulation for spikes. 

hi igor_tmp,

do it like it is described in the manual. If all LED are flashing, the manual says:

S7-300: Installation, page 220

Your CPU has an internal system error. The procedure is
as follows:
1. Set the mode selector switch to STOP.
2. Perform POWER ON/OFF.
3. Read the diagnostics buffer with STEP 7.
4. Read out the service data for CPUs ≥ V2.8 (see chapter
"Reading/saving service data (Page 205)" )
5. Contact your local SIEMENS partner.

SIMATIC S7-300 CPU 31xC and CPU 31x: Installation

share the diagnostic buffer with us, then we can say more about this behavior.

hope this helps,

regards,

igor_tmp

When operating CPU319F-3 DP / PN fails in his work. The result of this failure is to disable the processing of the control program and disable all outputs. In this front panel PLC occurs simultaneously all the LEDs blink.

Moreover, this situation may occur once in several days or several times a day.

After switching off and switching on power, PLC loads and works fine until the next failure.

Replacing the Firmware to the latest (6ES7318-3FL01-0AB0_V3213.zip), downloaded from the official site Siemens, the replacement of MMC cards on the same new one, CPU power connection to another source of power is not the result given.

Please tell me what could be wrong?

Hello, igor_tmp

Your CPU have internal error

I suggest you to open a    Support Request

Because i already suffered from this problem.

SANDEEP Bakoliya

Dear IGOR_tmp

                          I have been suffered from this  problem two times . One it was a faulty CPU fault resolved by replacement of CPU , And 2nd time there was a faulty Signal module in the rack & fault resolved by replacement of faulty module in the rack .

I am just telling you about my experience &  trying to show you the both possibilities .

Thanks & regards

Iftekhar .

hi Igor,

I had a look to the Diagnostic Buffer you sent us.

Service Data

Event 15 of 16:  Event ID 16# 4550
DEFECTIVE: internal system error
No relevance for user (Z1): f00f
No relevance for user (Z2): 082c (Z3): 8012
Previous operating mode: STOP (own initialization)
Requested operating mode: DEFECTIVE
Internal error, Incoming event
12:00:00.371 AM   01/01/1994
(Coding: 16# 4550  FF3D  C450  F00F  082C  8012)

 after that event a memory reset was requested and done.

As already mentioned I recommend you to open a Support Request

Send them the Diagnositc Data. They can say you exactly what happened and what you can do.

regards,