9/30/2010 1:33 AM | |
Posts: 5 Rating:
|
Hello! I have two questions about "FTP Server with the SIMATIC NET CP 443-1 IT" functionality. [schnippschnapp] 2) S7 CPU date in this solution are stored in cpu1/ folder. What kind of memory it is? I ask because if it's flash area of the IT-CP it's not a good way to refresh it very often. Am I right? Thanks for your answers, Splitted from I can read DB200 from S7-400 CPU definied in file_db.txt via FTP from /cpu1/cpu1db200 on IT CP?. |
Last edited by: O_Moderator at: 9/30/2010 1:29 PMnew subject after splitting |
|
9/30/2010 9:43 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating:
|
Hello, From the manual at page B5-20 "If you write temporary data often, you should switch to the RAM file system located in the \ram subfolder. The files of the RAM file system are lost if the power is turned off or fails." Have also a look to this manual at page 37 Memory Areas On the current IT-CPs, the file system is divided into 2 areas: - Flash area (non- volatile memory): The flash area allows data to be stored and retained if there is a power down. Since the number of times it is possible to write to this area is restricted, you should avoid repetitive write operations to this area, when such operations are necessary, write to RAM. - RAM area (volatile memory): In contrast to the flash area, the RAM can be written to and read from any number of times. The data in the RAM are retained as long as the IT-CP is supplied with power. The RAM is intended to store data that change during operation and need to be recorded (data recording services). The RAM is also suitable for temporary storage. The RAM is located in the file system below the “/ram” folder. All files and folders below this folder are lost when there is a power down. At page 101 and 102 you have an example of RAM usage. |
Best regards |
|
Follow us on