Mitsubishi Electric MELSEC-Q Series - Functional Comparison of CPU Module; Functional Comparison between Ans Series and Q Series

2 REPLACEMENT OF CPU MODULE
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2.3.1 Functional comparison between AnS series and Q series
: Available : Although available, specifications such as setting method partially differ. : Not available
*1 Device numbers are converted upon the programmable controller type change by GX Developer.
2.3 Functional Comparison of CPU Module
Function Description
AnS series Q series
Precautions for replacement Reference
AnSHCPU
A2US(H)
CPU(-S1)
A2ASCPU
(-S1/S30)
QnUCPU
Control
Constant scan
Executes the sequence program
at constant time intervals
regardless of the processing time
of the program.

Set this function with the special
register (D9020) for the AnS
series, and with parameters for
the Q series.
-
Latch (data
retention during
power failure)
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.
  --
Remote RUN/
STOP
Remotely runs or stops the
program operations in the CPU
module from external switches or
peripherals.
  --
PAUSE
Stops operations while holding
the output status.

Set this function in the special
register (M9040) for the AnS
series, and in the special relay
(SM206) for the Q series.
*1
-
Interrupt
processing
Executes the program that
corresponds to the cause when
an interrupt cause occurs.
  --
Microcomputer
mode
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.
 
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.
-
Display of priority of
ERROR LED
Sets the ERROR LED on/off
status at an error.
 
Target errors vary for each
module, but there is no functional
difference.
-
ROM operation
Enables operation with
parameters and programs stored
in ROM not to lose user programs
due to battery exhaustion.

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.
Section
7.7.12