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secs_sparkplug_b_integration_guide [2025/05/06 18:15]
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secs_sparkplug_b_integration_guide [2025/05/06 18:35] (current)
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| Parameters – ''LOTIDParamValue'' and ''PPIDParamValue'' appear exactly as entered by the host; on success they are echoed back unchanged. | Parameters – ''LOTIDParamValue'' and ''PPIDParamValue'' appear exactly as entered by the host; on success they are echoed back unchanged. |
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| Best-practice – SCADA / MES clients should subscribe to ''…HostCommandReply'' and check ''HCACK'' before assuming the tool accepted the command. | <note tip>SCADA / MES clients should subscribe to ''…HostCommandReply'' and check ''HCACK'' before assuming the tool accepted the command</note> |
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| {{puml_002.png?500|}} | {{puml_002.png?500|}} |
| Error detection – any non-zero ''HCACK'' must be treated as a transaction failure; the associated ''HostCommandPPSELECT'' echo still appears but only confirms that the message was transmitted, not that it succeeded. | Error detection – any non-zero ''HCACK'' must be treated as a transaction failure; the associated ''HostCommandPPSELECT'' echo still appears but only confirms that the message was transmitted, not that it succeeded. |
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| Client hint – log ''ReasonList_*'' for root-cause analysis and surface a human-readable alarm where appropriate. | <note tip>log ''ReasonList_*'' for root-cause analysis and surface a human-readable alarm where appropriate.</note> |
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| {{puml_003.png?500|}} | {{puml_003.png?500|}} |