) 
Возможно, необходимо вставлять специальные символы в начале и конце сообщения. (x16 - конец строки и тп).специальных требований к структуре нет.
Описался. Конечно, это статус.Borjomy_1 писал(а):Это не код ошибки, а флаг состояния
https://support.automation.siemens.com/ ... viewreg=WWIn order to be able to retrieve the messages from the data stream sent the data to be sent must have a specific structure. The message can comprise of the data plus a terminating control character such as "carriage return" so that the recipient can tell where the message ends.
Вот и гадай... Пока что прочитать данные на plc по TCP (Ethernet) не удалось.To make data transfer work via the TCP protocol the data to be sent must have a specific data structure. A message must consist of start delimiters (so that the recipient can recognize where the message begins), specification of the length of the data (to define the receive buffer) and the data itself. In this example we have defined start delimiters of 4 bytes (preset with the values: 0x11, 0x12, 0x13, 0x14) and an S7 string for a message. An S7 string consists of two bytes of length information and the actual data string. All ASCII characters can be transferred with the S7 string.
на AG_ResvПока получаю код ошибки 8181 - Job Active на AG_Send.
