S110 Acyclic error E1A1

Good evening,

I have an Acyclic-error message when trying to communicate between CPU and CU305PN. The project is to control the position of an axis by means of telegram 111 with a FB283.

So far has worked the communication because the motor and the PLC communication is already working. It moves in JOG and runs up and shut down when requested by variable table in PLC.

Main target is to change some TVB in the DB of my PLC and load them by means of a Variable table with the bit DB72.DBX14.1 (WR). 

The problem is that: I cannot write parameters on the S110 in acyclic mode (see please picture attached). When executing WR throughout a variable table comes an error (ErrorNumbr, DB72.DBW24) which is called "E1A1".

I cannot reset this error, instead I need to shut down the whole system and re-run everything again at least for two times so that the alarm is reset (bit DB72.DBX14.7 is another time to 0).

Does somebody know what exactly mean this error number?? I have had a look on plenty of Siemens manuals and I have not found a really relevant answer. Can somody help me?

Lots of thanks.

DGM

Thanks Teachteam,

Well in fact was not due to this. was that my UDT version was an older one or wrongly loaded after certain point. Presumly after the control sentence.

I have correctly introduced the UDT once more and so far everything is working.

Thanks for the quick answer though. Now still is going on a lot of fun with the hole programming. I will get back to you all shortly! :)

DGM

Hallo once again,

well, unfortunately my Problem is not gone... Once more the same alarm when writing TVB.

I have entered the parameters you have gently already told me.This is:

Satznummer: Int

Position: Dint

Geschwindigkeit: DInt

Beschleunigung: REAL

Verzoegerung: REAL

Befehl: Int

Befehlsparameter: DInt (not relevant because I had deactivated with DBB134)

Modus: Int

The whole process is shown below, I do not know if I am doing something wrong, so some advice would be very appreciated:

I load the values on a DB, these values I load them onto the Instance DB from my target axis in the area where the UDT 30001 is (which is up to bit 252.0) and, more precisely, I am doing it upon the bit 264.0 (Satznummer0) for a length of 24byte.

Then I enter the value “1” in DBW18 (Ind) which I suppose is the index of parameters p2616[2] – p2623[2] which I am not 100%sure of this, by the way. Following is that I enter as well DBW136 the value “0” to indicate the Verfahrsaetze Position which I suppose either that correspond to Satznummer 0 of region UDT30001 on my instance DB.

I introduce finally the value 30000 on DBW16 (tasksi) and I trigger WR (DBX14.1).

BUT, comes the alarm… What did I make wrong??