Mitsubishi FX-20P-E Operation Manual page 37

FX-20P-E Handy programming panel
2) The following condition is required to execute batch transfer to the PLC.
Write from HPP to PLC
Read from PLC to HPP
Collation between HPP and PLC
*The write-protect switch should be OFF.
Inbuilt HPP RAM
In the offline mode, programming is executed to the inbuilt HPP RAM.
Even if programming is executed to another PLC in the online mode by using the HPP
programmed in the offline mode, programs saved in the HPP remain saved as they are.
However, if programs are read and transferred from the PLC to the HPP in the offline mode,
programs saved in the HPP are erased.
Capacitor function
The inbuilt HPP RAM is backed up against power failure by the large capacitor.
(With power supply for 1 hour, the RAM is backed up for 3 days.)
Accordingly, programs can be transferred and written to another PLC from the HPP in which
programs have been entered in the offline mode.
RUN/STOP status of PLC
STOP
RUN/STOP
Outline of Programming 3
Program memory in PLC
RAM, EEPROM *
RAM, EEPROM, EPROM
3-3