The signature of this Method is specified below.

Signature

Start (

[out]0:Int32Status

);

Table 86 specifies the Arguments.

Table 86 – Start Method Arguments

Argument

Description

Status

0 – OK – Everything is OK

1 – E_SystemState – The system is not in correct state for this operation

2 – E_UnexpectedError – Unexpected Error during the method call

3 – E_ActiveAlarm – An Active Alarm prevents the system start

4 – E_AcknowledgeRequired – Condition needs to be acknowledged

<0 – shall be used for vendor-specific errors.

>0 – are reserved for errors defined by this and future standards

The Start method can only be successfully called when the task control is in the Ready state. Depending on the program pointer, the system shall attempt to start executing from the beginning of the program or continue executing from where it was suspended (see Substate machine description of this state in 7.17).

The possible Method result codes are formally defined in Table 87.

Table 87 - Method Result Codes (defined in Call Service)

Result Code

Description

Good

The task control operation succeeded

Bad_InternalError

The task control operation failed because of an internal error

Bad_ResourceUnavailable

The Method is locked by another Client/Clientgroup

Bad_UserAccessDenied

The caller is not allowed to call this Method.

The Start Method representation in the AddressSpace is formally defined in Table 88.

Table 88 – Start Method AddressSpace definition.

Attribute

Value

BrowseName

Start

References

NodeClass

BrowseName

DataType

TypeDefinition

Others

0:HasProperty

Variable

0:OutputArguments

0:Argument[]

0:PropertyType

M

ConformanceUnits

Rob Task Control Operation