Precautions For Replacement Of The Cpu Module; Memory In The Cpu Module - Mitsubishi Electric MELSEC-A0J2H Series Handbook

2
REPLACING THE CPU MODULE

2.4 Precautions for Replacement of the CPU Module

2.4.1 Memory in the CPU module

Referring to the memory configuration shown in (1), consider the memories for storage according to
memory capacity/application before replacement.
(1) Memory configuration and storable data
A0J2HCPU
*1 The Q00UJCPU does not have the standard RAM.
*2 There are files that cannot be used in the Q00UJCPU.
*3 Only one drive, drive 1 or drive 2, can be used.
*4 Q00UJCPU, Q00UCPU, Q01UCPU does not have a memory card.
*5 The Universal model CPU, whose program memory is a Flash ROM, does not have to perform the ROM operation.
Program
Parameter
RAM
Comment
File register
Program
Parameter
ROM
Replaceable with the
standard ROM when
performing ROM
operation.
Universal model QCPU
Program
Program
Parameter
memory
Comment
*5
(RAM)
Device initial value
(Drive 0)
File register
Standard
Local device
RAM
*1*2
Sampling trace
(Drive 3)
Program
Standard
Parameter
ROM
Comment
Device initial value
(Drive 4)
Program,Parameter
Memory
Comment,
card (RAM)
Device initial value,
*3*4
File register,
Local device,
(Drive 1)
Error history
Program,Parameter
Memory
Comment,
card (ROM)
Device initial value
*3*4
File register
(Drive 2)
2
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