BECKHOFF BC7300 - Manual (Page 39)

Bus Terminal Controller
BC7300 39
Persistent Data
2
The Persistent Data remain intact, even after a new program download and
a reset. Like the Retain Variables, they are stored in the flags area of the
Bus Terminal Controller.
Example: VarP1 AT %MB0: INT;
The Persistent Data are in the same area as the Retain Variables and also
start at %MB0. You first have to enable Retain Variables in order to
achieve a storage increase through the Persistent Data. By default, no
Persistent Variables are declared.
The Persistent Variable memory area must always be smaller or equal
than that of the Retain Variables.
The KS2000 software allows this area to be increased to a maximum of
512 bytes (Table 1, Register 18).
These data are deleted by a general reset.
2
From Firmware B4