Datablock / Retain / Protected memory area

PLCnext Technology & PLCnext Controls
1

Hi I would really like to have some memory place in the PLC, there wont be deleted when i download a complet program (F5)

It’s often i lose all the retain values, and settings in the system, and it’s so annoying. I can’t be that i need to read/write in a file every time? - Emil

2

Hi Emil, The only non-volatile RAM on AXC F 1152 and 2152 devices is 100% managed by the “retain” component of the PLCnext Runtime. If the “retain” features are not suitable, then yes - the only other way to persist data on the device is on the file system. ~ Martin.