Joseph Doherty
620ecc41dd
H4: exception 01/02/03 (and undecodable data) are device refusals - per-tag Bad with a once-per-tag Warning, no Degraded, and they advance LastSuccessfulRead (the device answered), so an all-refused driver no longer trips the 90 s watchdog. 04/05/06 still degrade (answered); 0A/0B degrade without advancing. Health is one worst-wins write per batch instead of last-writer-wins per tag. A comms failure on one unit fails the rest of that unit's batch fast; an unreachable endpoint fails the whole batch fast. H7: write transport failures map to BadCommunicationError, value overflow and array length mismatch to BadOutOfRange, conversion failures to BadTypeMismatch; writes report write-side health (a good write or a refusal clears a write-side Degraded; a good read does not). Lifecycle: every health write and the transport/table publish carry a generation; a superseded init releases its transport and publishes nothing, a read straddling a re-init cannot degrade the new transport, and the shutdown's final write cannot clobber a newer init. The tag table is build-and-swapped (re-init no longer merges into the old table). Teardown joins the probe/re-probe loops (bounded); a probe answer advances LastSuccessfulRead and an exception PDU from the device counts as Running. Transports latch dispose atomically and never reconnect after it. Refs #741 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
22 lines
910 B
C#
22 lines
910 B
C#
namespace ZB.MOM.WW.OtOpcUa.Driver.Modbus;
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/// <summary>
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/// The driver refused a write BEFORE anything reached the wire (wrong array length, a payload over
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/// <c>MaxRegistersPerWrite</c>, an unsupported shape). Carries the OPC UA status the write returns;
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/// it never touches driver health — nothing was sent.
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/// </summary>
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public sealed class ModbusWriteRefusedException : Exception
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{
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/// <summary>Initializes a new instance of the <see cref="ModbusWriteRefusedException"/> class.</summary>
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/// <param name="statusCode">The OPC UA status the write returns.</param>
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/// <param name="message">A human-readable description.</param>
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public ModbusWriteRefusedException(uint statusCode, string message)
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: base(message)
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{
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StatusCode = statusCode;
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}
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/// <summary>Gets the OPC UA status the write returns.</summary>
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public uint StatusCode { get; }
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}
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