Flash DiskΒΆ

The flash disk is an internal persistent mass storage device and can be used for any application purpose.

It has a memory capacity of 4 GB (preformatted).

The flash disk is capable of high data throughput, however, the actual values to be achieved depend on the use cases Flash Disk for AC500 V2 Products. If the performance seems to get insufficient, check the following:

  • If the PLCs CPU load is high, reduce overall CPU load of the PLC to have more performance for file operations.

  • If the device has low free space, cleanup the disk.

    Please consider the cluster size of 4 kB in your application design to achieve optimal usage of the flash disks space and access performance. For example, 10 files with 10 byte each require 10*4 kB disk space, while 1 file with 100 byte requires only 4 kB.

  • If the device is fragmented, cleanup the disk.

Size Product specific, see table Memory Sizes Introduction of AC500 Storage Devices for AC500 Products
IEC access CAA_File_Library: CAA_File Library
Diagnosis device number 33