Siemens Simatic S7-200 System Manual page 145

Defining Retentive Ranges of Memory
As shown in Figure 7-18, you can define up to six retentive ranges to select the areas of
memory you want to retain through power cycles. You can define ranges of addresses in the
following memory areas to be retentive: V, M, C, and T. For timers, only the retentive timers
(TONR) can be retained.
Note
Only the current values for timers and counters can be retained: the timer and counter bits
are not retentive.
To define the retentive ranges for the memory areas, select the CPU
command and click the Retentive Ranges tab. The dialog box for defining specific ranges to
be retentive is shown in Figure 7-18. To obtain the default retentive ranges for your CPU,
press the Defaults button.
CPU Configure
Output Table
Port 0
Range 0:
Range 1:
Range 2:
Range 3:
Range 4:
Range 5:
Configuration parameters must be downloaded before they take effect.
Figure 7-18
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
CPU Memory: Data Types and Addressing Modes
Port 1 Input Filters
Retentive Ranges
Password
Data Area Offset
Configuring the Retentive Ranges for the CPU Memory
Configure menu
Number of
Defaults
Elements
Clear
Clear
Clear
Clear
Clear
Clear
OK Cancel
7-15