we use several axc for our applications together with an HMI. The user sent via HMI values to the plc to change process-parameters.
But after reload of the plc the parameter are gone and the user need to resent all parameters again to the plc. Saving the parameters on HMI site is not possible.
Is there a way to save this parameters to the filesystem (sd-card) each time the user sent new values to the plc? And after reloading the plc check is there a file in place with values and restore the values?
There are several ways to store data persistently. And the option will depends on the amount of data, how often it will be changed, does data has to be available via file, etc. there is some retain bytes for store variable values. You may activate Retain checkbox while declaring variable in gds or fb dataspace. Also PLCNextBase library contains two items PBCL_ParamBackupMngt_1 and PBCL_ParamBackup_1. Which is very useful in case to store data on sd card.
Kindly read help chapters for this two ways.It should sufficiently