OPC client to DDE/SuiteLink data source – Write errors
- Last UpdatedAug 19, 2024
- 1 minute read
A failed write to a DDE/SuiteLink data source is handled as follows:
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If the data source responds with Nak, Gateway Communication Driver sends an E_FAIL error code to the OPC Client.
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If Gateway Communication Driver cannot successfully convert the requested OPC data, this maps to a new vendor specific error for OPC indicating "Conversion Error" (OPC_E_BADTYPE).
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If the item handle is unknown to Gateway Communication Driver or the data source, the OPC_E_INVALIDHANDLE error code is sent.
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If the item name is not valid in Gateway Communication Driver or the data source, the OPC_E_UNKNOWNITEMID error code is sent.