Omron CP1L - 12-2007, Operation Manual

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370
Battery-free Operation
Section 6-5
Relationship between
Input Voltage and PV in
A643
The maximum input voltage is 11 VDC. Do not apply a voltage greater than
that.
Application Example Setting the value for timer T101 in A643 makes it possible to use T101 as a
variable timer with a range of 0 to 25.6 s (0 to 256). A change in the set value
is reflected with the next scan.
Note External analog setting input values may vary with changes in the ambient
temperature. Do not use the external analog setting input for applications that
require highly precise set values.
6-5 Battery-free Operation
6-5-1 Overview
With the CP1L CPU Unit, saving backup data in the built-in flash memory
(non-volatile memory) enables operation with no battery mounted (i.e., bat-
tery-free operation).
I/O memory (such as CIO), however, is constantly refreshed during operation,
so backup data is not saved in the built-in flash memory. When battery-free
operation is used, therefore, programs must be created assuming that I/O
memory data will not be saved.
For example, if a battery is mounted, then HR, CNT, and DM data is saved
during power interruptions if a battery is mounted but not when battery-free
operation is used.
0 to 10 V
External analog
settings input
connector
Input voltage (V)
A643 PV (BCD)
281
256
0
0
10 11
0101
A 643
TIMX
Start input
T0101
100.01