DS200TBQAG1A1RST終端板_廈門阿米控技術有限公司

產品標題: DCS係統模塊卡件DS200TBQAG1A1RST終端板

型號： DS200TBQAG1A1

品牌：GE

產品詳情資料：

讀取字符串函數（4403）此函數導致從指定端口讀取字符，直到接收到指定的終止字符。字符從內部輸入緩衝區中讀取並放置在指定的輸入數據區中。該函數返回檢索到的字符數和仍在輸入緩衝區中的未處理字符數。如果請求輸入的字符為零，則只返回輸入緩衝區中未處理的字符數。如果終止字符不在輸入緩衝區中，則在接收到終止字符或超時間隔到期之前，操作狀態不會完成。在這兩種情況中，端口狀態都表示讀取操作完成的原因。如果超時間隔設置為零，COMMREQ將保持挂起狀態，直到它接收到請求的字符串，並以指定的結束字符終止。

產品英文詳情料:

Read String Function (4403) This function causes characters to be read from the specified port until a specified terminating character is received. The characters are read from the internal input buffer and placed in the specified input data area. The function returns both the number of characters retrieved and the number of unprocessed characters still in the input buffer. If zero characters of input are requested, only the number of unprocessed characters in the input buffer is returned. If the terminating character is not in the input buffer, the status of the operation is not complete until either the terminating character has been received or the time-out interval expires. In either of those conditions, the port status indicates the reason for completion of the read operation. If the time-out interval is set to zero, the COMMREQ remains pending until it has received the requested string, terminated by the specified end character.

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