Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

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12 DATA USED FOR POSITIONING CONTROL
12.12 Parameter Reflection
■
Precautions
• When the CPU is set in the extension parameter storage setting and the module extension parameter cannot be reflected
at power-on or the CPU module status is changed from STOP to RUN, Extension parameter acquisition error (Warning
code: 0B00H, 0B01H, 0B02H) occurs. At this time, the module extension parameter is the initial value set at the factory.
• The module parameter set with a program is overwritten with the parameter set with an engineering tool at power-on or
when the CPU module status is changed from STOP to RUN. When the module parameter is not written to the CPU
module, the setting value of the buffer memory is the factory default value at power-on and the value just before the status
change is held when the CPU module status is changed from STOP to RUN.
• To use the module extension parameter set with a program after the power is turned off or the CPU module status is
changed from STOP to RUN as well, backup the module extension parameter by using the module data backup function.
Parameter initialization
Initialize the parameter of the RD75 according to the methods as shown below.

: Initialized,

: Not initialized
*1 The extension parameter storage setting determines whether the module extension parameter file stored in the CPU module is
initialized or the module extension parameter file stored in the RD75 is initialized.
■
Precautions
When the module parameter is written to the CPU module, the written module parameter is reflected at power-on or when the
CPU module status is changed from STOP to RUN. To cancel reflecting the parameter, delete the parameter from the CPU
module or initialize the parameter with an engineering tool.
■
Restrictions
When the extension parameter storage setting has been set to "CPU", the module data initialization can be performed only
while the CPU module status is STOP. Use "[Cd.2] Module data initialization request" for the module data initialization.
Parameter backup
The module extension parameter in the buffer memory of the RD75 can be reflected to the module extension parameter file
with the following methods.
*1 The extension parameter storage setting determines whether the module extension parameter file stored in the CPU module is backed
up or the module extension parameter file stored in the RD75 is backed up.
■
Restrictions
When the extension parameter storage setting has been set to "CPU", the module data backup can be performed only while
the CPU module status is STOP. Use "[Cd.1] Module data backup request" for the module data backup.
Initialization method Data type Parameter to be initialized
Module parameter Module extension parameter
• Dedicated instruction GP.PINIT
• [Cd.2] Module data initialization
request
Buffer memory  
Parameter file
*1
 
Backup method Parameter to be backed up
Module parameter Module extension parameter
Dedicated instruction GP.PFWRT
 
[Cd.1] Module data backup request
 