Specialized use in conjunction with programming commands. The server (or Slave) has accepted the request and is processing it, but a long duration of time will be required to do so. This response is returned to prevent a timeout error from occurring in the client (or Master). The client (or Master) can next issue a poll program complete message to determine if processing is completed. 06 Slave Device Busy Specialized use in conjunction with programming commands. The server (or Slave) is engaged in processing a long-duration program command. The client (or Master) should retransmit the message later when the server (or Slave) is free.
Memory Parity Error
Specialized use in conjunction with function codes 20 and 21 and reference type 6, to indicate that the extended file area failed to pass a consistency check. The server (or Slave) attempted to read record file, but detected a parity error in the memory. The client (or Master) can retry the request, but service may be required on the server (or Slave) device. 0a Gateway Path Unavailable Specialized use in conjunction with gateways, indicates that the gateway was unable to allocate an internal communication path from the input port to the output port for processing the request. Usually means that the gateway is misconfigured or overloaded.
Gateway Target Device Failed To Respond
Specialized use in conjunction with gateways, indicates that no response was obtained from the target device. Usually means that the device is not present on the network.
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