Setting Retentive Memory Ranges - Automationdirect.com DL05 User Manual

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, etc. they will be erased when AUX 54 is used. Make sure you that you
have considered all ramifications of this operation before you select it.

Setting Retentive Memory Ranges

The DL05 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. Appendix F has more information pertaining to
the different types of memory. The default settings are:
Memory Area
Control Relays
V-memory
Timers
Counters
Stages
You can use AUX 57 to set the retentive ranges. Appendix A contains detailed information
about auxiliary functions. You can also set the retentive ranges by using Setup in
DirectSOFT 5, PLC > Setup > Retentive Ranges.
WARNING: The DL05 PLCs do not have battery back-up (unless the memory cartridge, D0–01MC,
is installed) 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.
Chapter 3: CPU Specifications and Operation
Default Range
C400 – C777
V1400 – V7777
None by default
CT0 – CT177
None by default
DL05 Micro PLC User Manual, 6th Edition, Rev. D
DL05
Available Range
C0 – C777
V0 – V7777
T0 – T177
CT0 – CT177
S0 – S377
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
A a
b B
c C
D D
3-9