applecruncher1

STAHL HMI outpur error: DB NOT AVAILABLE

11 posts in this topic

Hi,

We have a MT-40-TTY/232 PROVICOM TYPE connected to our Siemens S5-95U. Recently we have been encountering an error message all the time:

KOMMUNIKATION

*** F E H L E R ***
DB NICHT VORHANDEN

 

1735201192.thumb.jpg.1187797e993e2bcb9c5

 

Apparently, in google translate it means DB NOT AVAILABLE. What does DB mean? Datablock? What could be the cause of this?

Ever since this has happened, the HMI cannot output the real time sensor values and all of the keys we press on the HMI will not do anything at all.

I am currently checking the output in the S5-95U using PG2000 and I've filtered the DB and they exist.

583fb081946ec_BlockDBs.PNG.a3abe840e87f1

 

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Hi,

Please check if the HMI cable is connected to PLC.

Can you wrote the full history of this control system?

I mean how it happened:

"one output was not working and we did that checks,"

"onother day we remove the battery ...."

Please, can you make a copy of actual PLC  program and send to me by e-mail? 

Or even better: post the program on that forum.

More people can look into and can guide you.

I would like to have a look at actual running program.

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The HMI cable is the silver one that was connected to the PG Port so I can only check the PLC if I disconnect the cable. That's the problem, we cannot trace the origin. It just happened as we were operating.

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Attached here is the program. I'm not familiar much with the program though. Actually I'm studying it myself.

 

PRESS ST.S5D

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Then,

when you connect back the silver cable, the problem of HMI disappear?

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No, the silver cable connects the HMI to the PG Port of the PLC. This is how the HMI gets the output values of the sensor data. So whenever the machine is started up, the error message will flash on the HMI. There are warning signals that appear like "Press temperature < 90 C" so we know the HMI is somehow getting data from the PLC. However, besides that we can't do anything with the HMI. I think that the HMI cannot see the DB values.

Edited by applecruncher1

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Please let me understood corect:

the message on HMI is still present even when the silver cable is connected to PG port of PLC?

or the errors message appear during start-up phase ?

 

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The message on HMI is present once the silver cable is connected to PG port of PLC. The error message is on display all the time even in operation.

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I just check the values of DB31 and DB100: - I guess that PLC run the program from Eprom.

Have you make an overall reset to this PLC?

If you did not yet, please wait and not be hurry to do it.

Edited by dekor
changed the ideea

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