Functional Comparison Of Cpu Module; Functional Comparison Between Ans Series And Q Series - Mitsubishi Electric MELSEC Q Series Handbook

2
REPLACEMENT OF CPU MODULE

2.3 Functional Comparison of CPU Module

2.3.1 Functional comparison between AnS series and Q series

Function
Constant scan
Latch (data
retention during
power failure)
Remote RUN/
STOP
PAUSE
Interrupt
processing
Microcomputer
mode
Display of priority of
ERROR LED
ROM operation
*1 Device numbers are converted upon the programmable controller type change by GX Developer.
2
- 14
: Available : Although available, specifications such as setting method partially differ.
Description
AnSHCPU
Executes the sequence program
at constant time intervals
regardless of the processing time
of the program.
Holds the data of devices when
turning off the power, resetting,
and a momentary power failure
longer than the allowable
momentary power failure time
occurs.
Remotely runs or stops the
program operations in the CPU
module from external switches or
peripherals.
Stops operations while holding
the output status.
Executes the program that
corresponds to the cause when
an interrupt cause occurs.
Executes various controls and
operations over utility programs
and user created microcomputer
programs stored in the
microcomputer program area by
calling them from the sequence
program.
Sets the ERROR LED on/off
status at an error.
Enables operation with
parameters and programs stored
in ROM not to lose user programs
due to battery exhaustion.
AnS series Q series
A2US(H)
CPU(-S1)
QnUCPU
A2ASCPU
(-S1/S30)
Set this function with the special
register (D9020) for the AnS
 
series, and with parameters for
the Q series.
  
  
Set this function in the special
register (M9040) for the AnS
 
series, and in the special relay
(SM206) for the Q series.
  
Consider use of sequence
program, etc., as the substitution.
Instructions from any utility

 
package need to be replaced with
the corresponding instructions of
the QCPU.
Target errors vary for each
   module, but there is no functional
difference.
AnS series CPU modules can
perform the ROM operation by
using EEP-ROM cassette (sold
separately).
 
The Universal model QCPU,
whose program memory is a
Flash ROM, does not have to
perform the ROM operation.
: Not available
Precautions for replacement Reference
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*1
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Section
7.7.12
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