Precautions Depending On Parameter Setting Method - Mitsubishi Electric MELSEC-Q Series User Manual

7 ONLINE MODULE CHANGE

7.4.3 Precautions depending on parameter setting method

FeRAM backup
*1: This indicates the sequence program that is executed on the rising edge of Module ready flag
(Xn3).
*2: Even if the restore processing is performed at any timing between the steps "After mounting the
module, click the [Execution] button of GX Developer" and "Operate GX Developer to resume the
online module change mode, and click the [Execution] button to resume control" of user operation
in Section 7.2, the buffer memory is overwritten by sequence program for writing initial values.
Perform the restore processing after the step "Operate GX Developer to resume the online
module change mode, and click the [Execution] button to resume control" is completed.
*3: Perform the restore processing after the step "After mounting the module, click the [Execution]
button of GX Developer" of user operation in Section 7.2 is executed and data in FeRAM is
restored. Data in FeRAM can be restored by setting values in the buffer memory and turning on
FeRAM backup start command (Yn8) by test operation of GX Developer.
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Parameter setting method
Sequence
GX Configurator-
program for writing
TC initial setting
initial values
Precautions
When saving and
restoring data in
*1
the buffer memory
None
* 2
None
* 2
* 3
* 2 , * 3
* 2
* 2 , * 3
MELSEC-Q
: Used, : Not used
When not saving
and restoring data
in the buffer
memory
None
None
None
None
None
None
None
None
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