Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Simatic technology v5.0 -> v6.0

Created by: DavidBrown at: 12/19/2021 1:02 PM (5 Replies)

Rating (0)

Thanks 1

6 Entries

12/19/2021 1:02 PM	Rate (0)
DavidBrown Gold Member Joined: 6/29/2012 Last visit: 12/25/2023 Posts: 975 Rating: (9)	I have a project with S71517TF cpu. Project was first done with TIA v16. In this projects I have Cam TO's, on which I execute the function 'MC_GetCamLeadingValue'. This function works properly in the TIA v16 project. The input 'Cam' of the function is supplied with the camnr from a reference in a datablok that is of type 'DB_ANY'. In the variable the number of the datablok of the cam is written (in this case 50500). Now I converted the project to TIA V17 update 1. I updated the firmware release of the plc to the latest one, and switched the TO's from version 5.0 to 6.0. If now I execute exact the same function, the function block does not supply any of its output signals (busy, done, error stay low although an edge is given on the execute input). If however I do not supply the cam input with a DB_Any variable but with the cam name the function works properly. Is something changed in technology v6.0? I work with the DB_Any variable for reference to cam objects because I have to execute the function for a whole range of cams, so I cannot hardcode it with the cam name. How can I solve my problem? Thanks

Suggestion To thank Quote Answer

12/19/2021 9:18 PM	Rate (0)
DavidBrown Gold Member Joined: 6/29/2012 Last visit: 12/25/2023 Posts: 975 Rating: (9)	I now see that also for other motion commands like Camin, I do not get any output signals (busy, done, error) out of the MC function block if I use TIA V17 and plc sim (tried with Plc Sim V17 and Plc sim advanced 4.0). Same program in Tia V16 and in Plc Sim V16 or Plc Sim Advanced 4.0 is working.

Suggestion To thank Quote Answer

12/19/2021 10:55 PM	Rate (0)
DavidBrown Gold Member Joined: 6/29/2012 Last visit: 12/25/2023 Posts: 975 Rating: (9)	I see that I get an error in the diagnostic buffer : Acces error (Data block type) DB402 in OB1.I call now the MC_GetCamLeadingValue in OB1 as test with at the Cam input the DB_ANY parameter. This is for the TIA v17. If I test the same in TIA v16 I don't get the error.

Suggestion To thank Quote Answer

12/20/2021 10:21 AM	Rate (0)
daviso Bronze Member Joined: 11/4/2011 Last visit: 2/14/2025 Posts: 256 Rating: (28)	With TO version V6.0 you cannot assign DB_Any to the Cam input of a MC-function anymore, see here in seciton "Using DB_ANY in the cam technology object": https://support.industry.siemens.com/cs/ww/de/view/109781848/138794212363?dl=en I guess that since TO version V6.0 now also contains a TO Cam10k, the MC-function just cannot blindly map DB_Any to type TO_Cam anymore, but also cannot find out which type it is during runtime. So you'll have to convert the DB_Any to the explicit data type it inherits by using function TypeOfDB and calling a wrapper function that does the convert. Example with pseudo-code: IF TypeOfDB(<myDbAny>) is TO_CAM THEN //call an FB/FC with input of type TO_CAM and connect the <myDbAny> to this; inside this FB/FC call the MC-function then and connect this input to it ELSE IF IF TypeOfDB(<myDbAny>) is TO_CAM10k THEN //call an FB/FC with input of type TO_CAM10k and connect the <myDbAny> to this; inside this FB/FC call the MC-function then and connect this input to it ..... Regards, daviso
	Last edited by: daviso at: 12/20/2021 10:21:21 Last edited by: daviso at: 12/20/2021 10:22:07
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users AutoGen_1425767

12/20/2021 2:33 PM	Rate (0)
AutoGen_1425767 Regular Member Joined: 11/19/2021 Last visit: 7/11/2023 Posts: 17 Rating: (0)	I tried this with a wrapper with input of type TO_Cam. Outside the DB_Any reference to the cam is connected and inside the input of type TO_Cam is connected to the MC_GetLeadingValue. This works ok. I also looked in the LAXisCtrl function block from Siemens for V17 and I saw they did there something simular. I suppose this is the only way to solve this as a reference in a datablock to a Cam can only be of type DB_Any, I don't see the possibility to use type TO_Cam in datablock variable. The only thing that seems possible is having an input of FC or DB as type TO_Cam that will then be used in the block for the MC function, on the outside a DB_ANY variabel can be connected to the input of type TO_Cam.

Suggestion To thank Quote Answer

12/20/2021 3:30 PM	Rate (0)
daviso Bronze Member Joined: 11/4/2011 Last visit: 2/14/2025 Posts: 256 Rating: (28)	Yes, this is exactly how it works. Doing what you did (connecting the DB_Any to an input of type TO_Cam, then using this parameter of type TO_Cam at the MC-instruction) is the way to go. This is the way how to convert from DB_Any to the explicit type, and this explicit type is needed at the MC-instruction for TO Cam / Cam10k sinc eTO V6.0 as shown in the manual. Long story short: Right solution, this is the way to do this. Regards, daviso

Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on