AdsClient.TryInvokeRpcMethod Method (IRpcCallableInstance, IRpcMethod, .Object., .AnyTypeSpecifier., AnyTypeSpecifier, .Object.., Object.)
Tries the invoke RPC method.
Namespace: TwinCAT.Ads
Assembly: TwinCAT.Ads (in TwinCAT.Ads.dll)
Version: 6.0.328+39e3229
Syntax
C#
public AdsErrorCode TryInvokeRpcMethod(
IRpcCallableInstance symbol,
IRpcMethod rpcMethod,
Object[]? inParameters,
AnyTypeSpecifier[]? outSpec,
AnyTypeSpecifier? returnSpec,
out Object[]? outParameters,
out Object?? returnValue
)
Parameters
symbol |
Type: TwinCAT.TypeSystem.IRpcCallableInstance |
rpcMethod |
Type: TwinCAT.TypeSystem.IRpcMethod |
inParameters |
Type: .System.Object. |
outSpec |
Type: .TwinCAT.TypeSystem.AnyTypeSpecifier. |
returnSpec |
Type: TwinCAT.TypeSystem.AnyTypeSpecifier |
outParameters |
Type: .System.Object.. |
returnValue |
Type: System.Object. |
Implements
Exceptions
Exception |
Condition |
---|---|
symbol | |
rpcMethod |
Remarks
The RpcMethod optionally support In-Parameters, Out-Parameters and Return values. Therefore the parameters inParameters, outParameters, are allowed to be empty or NULL.
Examples
The following sample shows how to call (Remote Procedures / Methods) within the PLC.
Dynamic Tree Mode
class RpcCallVirtualProgram
{
/// <summary>
/// Defines the entry point of the application.
/// </summary>
/// <param name="args">The arguments.</param>
static void Main(string[] args)
{
// Get the AdsAddress from command-line arguments
AmsAddress address = ArgParser.Parse(args);
using (AdsClient client = new AdsClient())
{
//client.Synchronize = false;
// Connect to the target device
client.Connect(address);
SymbolLoaderSettings settings = new SymbolLoaderSettings(SymbolsLoadMode.VirtualTree);
ISymbolLoader loader = SymbolLoaderFactory.Create(client, settings);
// Get the Symbols (Dynamic Symbols)
IStructInstance main = (IStructInstance)loader.Symbols["MAIN"]; // Gets the MAIN Instance of the PLC Program
// Call a Method that has the following signature (within MAIN Program)
/* {attribute 'TcRpcEnable'}
METHOD PUBLIC M_Add : INT
VAR_INPUT
i1 : INT := 0;
i2 : INT := 0;
END_VAR
*/
short result = (short)main.InvokeRpcMethod("M_Add", new object[] {(short) 3, (short) 4});
// Call a Method that has no parameter and returns VOID
main.InvokeRpcMethod("M_Method1", new object[] {});
//Browsing RpcMethods
foreach(IRpcMethod method in main.RpcMethods)
{
string methodName = method.Name;
foreach(IRpcMethodParameter parameter in method.Parameters)
{
string parameterName = parameter.Name;
string parameterType = parameter.TypeName;
}
}
}
}
}