DL06 Micro PLC User Manual, 3rd Edition, Rev. E
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Chapter 3: CPU Specifications and Operation
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WARNING: You may never have to use this feature unless you want to clear any setup information
that is stored in system memory. Usually, you’ll only need to initialize the system memory if you
are changing programs and the old program required a special system setup. You can usually load
in new programs without ever initializing system memory.
Remember, this AUX function will reset all system memory. If you have set special parameters
such as retentive ranges, for example, they will be erased when AUX 54 is used. Make sure that
you have considered all ramifications of this operation before you select it. See Appendix F for
additional information in reference to PLC memory.
Setting Retentive Memory Ranges
The DL06 PLCs provide certain ranges of retentive memory by default. The default ranges are
suitable for many applications, but you can change them if your application requires additional
retentive ranges or no retentive ranges at all. The default settings are:
You can use AUX 57 to set the retentive ranges. You can also use
Direct
SOFT menus to select
the retentive ranges. Appendix A contains detailed information about auxiliary functions.
WARNING: The DL06 CPUs do not come with a battery. The super capacitor will retain the values
in the event of a power loss, but only for a short period of time, depending on conditions (typically
4 to 7 days). If the retentive ranges are important for your application, make sure you obtain the
optional battery.
Memory Area
DL06
Default Range
Available Range
Control Relays
C1000 – C1777
C0 – C1777
V-Memory
V400 – V37777
V0 – V37777
Timers
None by default
T0 – T377
Counters
CT0 – CT177
CT0 – CT177
Stages
None by default
S0 – S1777
