Specifications Comparison Of Cpu Module - Mitsubishi Electric MELSEC-A0J2H Series Handbook

2
REPLACING THE CPU MODULE

2.2 Specifications Comparison of CPU Module

Function Description
Control Cyclic operation
method (by the stored program)
I/O control
Refresh mode/direct mode
method
Language dedicated to
Programming sequence control
language (relay symbol, logic symbol,
and MELSAP languages)
Processing Sequence instruction
speed (µs/step)
Watch dog Watch dog timer
timer (WDT) (WDT) (ms)
Memory User memory capacity
capacity (Byte)
Sequence program
(step)
Program
capacity
Microcomputer program
(byte)
Number of I/O points
Number of
*4
I/O points
(points)
*1 The direct I/O is selectable using the I/O control mode settings switch.
*2 Although QCPU supports only refresh mode, it has some instructions/devices for I/O in direct mode.
*3 This is the capacity that can store the maximum number of steps of the sequence program.
*4 This is the number of accessible points of actual I/O modules.
2
- 3
: Usable : Usable, however, a section of the specifications, i.e. setting methods, is different × : Not used
QnUCPU
A0J2HCPU
Q00UJCPU
*1 *2
1.25 0.12
10 to 2000 10 to 2000
Program memory
*3
(Flash ROM)
32K
40K
(Built-in
Standard RAM:-
RAM)
Standard ROM:
256K
Max. 8K Max.10K
Max. 14K ×
480 256
Precautions for replacement
Q00UCPU
As QCPU supports only refresh
mode, use the direct I/O instruction
*2
when inputting or outputting in direct
mode.
Regarding MELSAP language,
A0J2HCPU uses MELSAP II and
QCPU uses MELSAP3.
0.08
10 to 2000
Program memory
*3
(Flash ROM)
40K
Standard RAM:
128K
Standard ROM:
512K
Max.10K
QCPU does not have a
microcomputer program.
× It is recommended to replace the
microcomputer program with a
sequence program.
1024
Reference
sections
– –
Section
7.7.2
Section 7.6
– –
– –
Section
–
2.4.1
– –
–
– –