IAI America PSEL - Manual (Page 79)

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Part 1 Installation
5.1 How to Save Data
The flow to save data in the PSEL controller is illustrated below.
When data is transferred from the PC software or teaching pendant to the controller, the data is only
written to the main CPU memory as shown in the diagram below and will be erased once the controller is
powered down or reset.
For important data, always write to the flash memory so that they will not be lost.
5.1.1 Factory Settings: When the System-Memory Backup Battery is Not Used
Other parameter No. 20 = 0 (System-memory backup battery not installed)
Since the programs, parameters and symbols are read from the flash memory at restart, the data in the
temporary memory will remain the same as the original data before edit unless the edited data are written
to the flash memory.
The controller always operates in accordance with the data in the main CPU memory (excluding the
parameters).
Note: SEL global data cannot be retained if the backup battery is not installed.
SEL global data will be cleared once the control power is turned off or a software reset is
executed.
The error list will be cleared once the control power is turned off.
Data edited on the PC
or teaching pendant
Data will be retained while the power
is on and cleared upon reset
Data will be retained even after
the power is turned off
PC
software,
TP
Transfer
Transfer
Main CPU memory
Programs
Parameters (other than
encorder parameters)
Symbols
Positions
Write to flash memory
Transfer upon reset
Transfer upon reset
Transfer
Main CPU flash memory
Slave card memory
Encoder parameters
SEL global data (flags,
variables, strings)
Error lists