The Method UnloadMaterials requires the materials loaded at the loading point to be unloaded. In some implementations the unloading is automated, in other the unloading is performed by the user. The Method UnloadMaterials may be triggered by an MES client to request a material subject to brand change to be unloaded.

Signature

UnloadMaterials (

[out] MethodExecutionFeedbackTypeExecutionFeedback

);

Argument	Description
ExecutionFeedback	The extended feedback returning a detailed message in case of execution failure.

When an UnloadMaterials Method is executed by the underlying system, the Message in MethodExecutionFeedback is suitably displayed on the machine HMI to inform the machine user and provide useful instructions, e.g. “A remote materials unloading is requested by […]”, […] contains the client name.

Method Result Codes

ResultCode	Description
BadNodeIdUnknown	See table 173 in OPC 10000-4 for the description of these result codes.
BadTypeMismatch
BadOutOfRange
BadNotWritable
BadNotFound