Message Format¶
All the JSON messages have the following structures:
Field | Description | |
---|---|---|
Header | ||
MessageType | The type of the JSON message. It can have the following values: | |
READ_REQUEST | ||
READ_RESPONSE | ||
WRITE_REQUEST | ||
WRITE_RESPONSE | ||
VALUELIST_REQUEST | ||
VALUELIST_RESPONSE | ||
VALUEINFO_REQUEST | ||
VALUEINFO_RESPONSE | ||
MONITORSTART_REQUEST | ||
MONITORSTART_RESPONSE | ||
MONITORSTOP_REQUEST | ||
MONITORSTOP_RESPONSE | ||
MONITORUPDATE_MESSAGE | ||
HISTORICALREAD_REQUEST | ||
HISTORICALREAD_RESPONSE | ||
ClientHandler | An identifier of the message which is set by the client in the request. The server copies its value to the corresponding response. | |
[StatusCode] | Is sent if an error occurs by processing the request from the client. | |
Body |
All the JSON messages are described by using our Notation.