Registration Of Data In Extension Registers And Extension File Registers - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
• In FX PLCs
3G
Data can be written to the memory cassette (EEPROM) up to 10,000 times, and to the built-in memory
(EEPROM) up to 20,000 times.
Every time the RWER (FNC294) instruction is executed, it is counted as a write to the memory. Make sure
not to exceed the allowable number of writes.
When a continuous operation type instruction is used, data is written to the memory in every operation
cycle of the PLC. For preventing this, make sure to use a pulse operation type instruction.
Execution of the LOADR (FNC290)instruction is not counted as a write to the memory.

4.10.8 Registration of data in extension registers and extension file registers

This subsection explains the operating procedures of GX Developer (Ver.8.72A or later).
→ For details on GX Developer operating procedures, refer to the GX Developer manual.
1
Starting up GX Developer (GPPW)
Click [Start]-[All Programs]-[MELSOFT Application]-[GX Developer] in Microsoft Windows.
2
Setting the PLC model
Set the PLC Series and PLC type as shown below.
Essential set item
PLC series
PLC Type
*1
*1. For Ver. 8.13P to 8.24A of GX Developer, the PLC type is FX3UC.
146
4.10 Extension Register [R] and Extension File Register [ER]
Contents of setting
FXCPU
*1
FX3U(C) , FX3G
4 Devices in Detail