Joseph Doherty
dcc35f3481
An array tag subscribed natively used to register only its declared scalar (publishing element 0 at Good) and was then refused wholesale with BadTypeMismatch. The driver now hands the authored ArrayLength to the client, which registers the whole array as raw bytes and decodes every notification. - TwinCATTypeGuard.CheckArray plans the layout from the RESOLVED array type: element checked like a scalar notification (width / float kind / string kind); STRING(n)/WSTRING(n) elements stride n+1 / 2(n+1); multi-dim arrays flattened in PLC memory order; an authored ArrayLength shorter than the PLC array reads the leading sub-range, a longer one is refused; struct / pointer / nested-array elements, non-array symbols and VAR_IN_OUT refs are refused. - CheckNotificationSize caps a native array at 128 KiB (largest registration proven on a live TC 2.11 target); above it the tag is refused BadOutOfRange. - TwinCATArrayCodec decodes the bytes into the element-typed CLR array. - The poll read uses the same plan + codec instead of the Beckhoff typed array read, which failed live for most real arrays (exact CLR element type, rank-N for multi-dim, member arrays sliced by the under-reported TC2 symbol size). - TwinCATNotificationRefusedException carries the refusal's status; the type mismatch derives from it and the driver isolates either per tag.
29 lines
1.4 KiB
C#
29 lines
1.4 KiB
C#
namespace ZB.MOM.WW.OtOpcUa.Driver.TwinCAT;
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/// <summary>
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/// Thrown by <see cref="ITwinCATClient.AddNotificationAsync"/> when the client refuses to register a
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/// native notification for one tag — its declared type cannot decode the PLC symbol
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/// (<see cref="TwinCATTypeMismatchException"/>), or an array is too large for a native notification.
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/// The driver isolates that one tag to <see cref="StatusCode"/> (one WARN) and keeps the rest of the
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/// subscription; the intent stays registered so the probe-tick retry re-checks it.
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/// </summary>
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internal class TwinCATNotificationRefusedException : Exception
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{
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/// <summary>Initializes a new instance of the <see cref="TwinCATNotificationRefusedException"/> class.</summary>
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/// <param name="symbolPath">The ADS symbol the tag names.</param>
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/// <param name="reason">The one-line reason.</param>
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/// <param name="statusCode">The OPC UA status the refused tag publishes.</param>
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public TwinCATNotificationRefusedException(string symbolPath, string reason, uint statusCode)
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: base($"TwinCAT symbol '{symbolPath}': {reason}")
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{
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SymbolPath = symbolPath;
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StatusCode = statusCode;
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}
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/// <summary>Gets the ADS symbol the refused tag names.</summary>
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public string SymbolPath { get; }
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/// <summary>Gets the OPC UA status the refused tag publishes.</summary>
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public uint StatusCode { get; }
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}
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