OTX ExecuteDiagService

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Name ExecuteDiagService
Short Description Sends a diagnostic services to the ECU.
Class Action
Extension OTX DiagCom extension
Group DiagService related actions
Exceptions IncompleteParameterizationException
Checker Rules DiagCom_Chk001
Standard Compliant Yes

OTL Syntax

DiagCom.ExecuteDiagService(DiagServiceTerm diagService, {RequestParameters[ ] requestParameters}, {ResponseParameters[ ] responseParameters}, ResultVariable result, ResultStateVariable resultState, System.Boolean executeAsync, System.Boolean suppressPositiveResponse);


The ExecuteDiagService action is used for performing diagnostic vehicle communication. An ExecuteDiagService node in an OTX sequence indicates to the runtime system that at this point, a service request will be transmitted to one or more ECUs and one or more responses can be received. The ExecuteDiagService action requires the following information:

  • The DiagService to use
  • The mapping of OTX values to the service’s Request-Parameters
  • The mapping of values of the service’s response parameters to OTX variables

The writing/reading of values to/from service request and/or response parameters can be done in two ways, depending on whether a service’s parameter structure is known at OTX authoring time or will have to be dynamically evaluated at run time:

  • Inline mapping: In case a service’s parameter structure is static (known at authoring time), the ExecuteDiagService action can be used to define request and response parameter mappings inline through its Request- and Response-Parameters members.
  • Dynamic response: In case a service’s parameter structure is dynamic at runtime (not known at authoring time), it is possible to use terms defined by the DiagCom extension to evaluate request and response parameter structures by explicit OTX statements.


Name Data Type Class Default Cardinality Description
ExecuteAsync Boolean Value false [0..1] This option tells the communication backend to make this diagnostic service execution non-blocking. This means that if executeAsync is set to true, the OTX execution flow will immediately move on to the next Action, without waiting for the result of the ExecuteDiagService action.
SuppressPositiveResponse Boolean Value false [0..1] This option tells the ECU(s) addressed by the diagnostic service to suppress sending of a positive response. This feature has to be supported by the underlying communication system, diagnostic protocol and specific diagnostic service.
DiagService DiagService Term - [1] The element specifies the service which will be executed, see CreateDiagServiceByName or CreateDiagServiceBySemantic.
RequestParameters RequestParameters - - [0..*] Collection of Terms which are mapped to service request parameters.
ResponseParameters ResponseParameters - - [0..*] Collection of Response Parameters which are mapped to OTX Variables.
Result Result Variable - [0..1] After execution of the diagnostic service, the first result will be assigned to the variable given by this optional element. In order to get further results (e.g. in case of cyclic execution), the GetAllResults term will be used
ResultState ResultState Variable - [0..1] After execution of the diagnostic service, the state of its first result (i.e. whether the ECU(s) answered at all, correctly, positively or negatively) will be assigned to the variable given by this optional element. In order to get the result state of further results (e.g. in case of cyclic execution), the GetResultState term will be used.

OTL Examples

/// Local Declarations

// The example shows the execution of an diagnostic service after establishing the communication
DiagCom.ComChannel ComChannel1;
DiagCom.DiagService DiagService1;
DiagCom.Result Result1;
DiagCom.ResultState ResultState1 = @ResultState:ALL_INVALID;
Integer DataRecord1;

/// Flow

ComChannel1 = DiagCom.GetComChannel("LL_GatewUDS", NULL, false);
DiagService1 = DiagCom.CreateDiagServiceByName(DiagCom.GetComChannel("LL_GatewUDS", "", false), "DiagnServi_ReadDataByIdentECUIdent");
[#MetaData(RequestPdu), <#Data>22 F1 7B</#Data>]
DiagCom.ExecuteDiagService(DiagService1, {Param_RecorDataIdent = "VW Coding Date"}, {Resp_ReadDataByIdentECUIdent.Param_DataRecor = DataRecord1}, Result1, ResultState1, false, false);

See also