UDT (User Defined Data Types ) in SCL

[thetripathi]

Hi All,
I have created structured data types for my application because this gives a clear explanation of the variables used.For this I have lot of UDTs in my program.I have tried to create a FB in SCL.But the compiler doesn't allow this.The declared variable already exists in symbol table also and I have defined the structured variable in the IN_OUT field.But still the complier is not able to identify this variable.I will paste a part of my code and the error which is coming.

FUNCTION_BLOCK FB600
VAR_IN_OUT

CSData:CSData;

END_VAR

CS.Par.DiaBlade := 380.0; (* [mm] Actual blade diameter *)
CS.Par.DiaCorr := 32.54; (* [mm] Reduction to blade diameter = (Blade overlap) + (Material Dimension) *)
CS.Par.NMax := 980.0; (* [rpm] Max motor speed *)
CS.Par.TorqNom := 2467.8; (* [Nm] Nominal motor torque *)
CS.Par.GearRatio := 1.0; (* Gear ratio (Motor speed / output speed) *)
CS.Par.JTot := 15.2; (* [Kgm2] Total inertia including motor *)


END_FUNCTION_BLOCK

The red colour ones are my structured variable.

Can anybody throw a light on this.

Thanx
Preet

 

[L D[AR2P#0.0]]

As you haven't posted the UDT I can't verify that this will compile. The obvious mistakes are that the parameter name you have chosen is CSData but in the code you have used CS. I am assuming the UDT is named CSData in the symbol table, in which case you need to put it in quotes to refer to it symbolically.

FUNCTION_BLOCK FB600
VAR_IN_OUT

[b]CS:"CSData";[/b]

END_VAR

[color=red]CS.Par.DiaBlade[/color] := 380.0; (* [mm] Actual blade diameter *)

END_FUNCTION_BLOCK