Mitsubishi Electric MELSEC iQ-R RD75P4, Руководство пользователя

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12 DATA USED FOR POSITIONING CONTROL
12.12 Parameter Reflection
489
12
Each parameter is reflected to the buffer memory of the RD75 at the following reflection timings.
*2 Some module parameters are reflected to the RD75 from the buffer memory by turning off and on PLC READY signal [Y0]. For details,
refer to the following.
 Page 346 Valid timing of setting data
*3 When the parameter to be reflected does not exist at the reflection timing, refer to the following.
 Page 489 Parameter reflection
*4 If the parameter is not set with an engineering tool, the initial value is stored.
■
Precautions
• To write module extension parameters to a file, specify the same write destination as the one set in the extension parameter
storage setting. When a different write destination is specified, written module extension parameters are not valid. When
the module extension parameter file does not exist in the storage destination set in the extension parameter storage
setting, Extension parameter acquisition error (Warning code: 0992H) occurs at the reflection timing.
• To change a module extension parameter from a program when the extension parameter storage setting is "CPU", change
the parameter while Module access flag [X1] is on (module access permitted). While Module access flag [X1] is off (module
access disabled), the module extension parameter is changed by the internal processing of the RD75.
• To use the module extension parameters stored in the SD memory card of the CPU module, set the storage location to
"CPU" in the extension parameter storage setting. Set "Memory Card Parameters" of the CPU module so that module
extension parameters can be used.
■ Restrictions
When the extension parameter storage setting has been set to "CPU", the module data backup and the module data
initialization can be performed only while the CPU module status is STOP. Use "[Cd.1] Module data backup request" for the
module data backup and "[Cd.2] Module data initialization request" for the module data initialization.
Parameter reflection
In the RD75, the parameter is reflected to the buffer memory at power-on or when the CPU module status is changed from
STOP to RUN. The following table shows the parameters reflected to the buffer memory.
*1 When the parameter of the RD75 does not exist in 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.
*2 When the data in the RD75 is damaged, Flash ROM sum check error (Error code: 1932H) occurs.
When a module extension parameter is changed with a program, the changed module extension parameter
can be reflected to the buffer memory when the power is turned on or the CPU module status is changed from
STOP to RUN.
Parameter storage timing Operation Parameter setting value reflected to the buffer memory
Module parameter
*2
Module extension parameter
*3
(Extension parameter storage setting)
CPU module RD75
Power-on Power-on Setting value of the module
parameter file in the CPU
module
*4
Setting value of the module
extension parameter file in
the CPU module Setting value of the module
extension parameter file in
the RD75
CPU module status: STOP

RUN
CPU module status: STOP

RUN
The parameter just before
the status change of STOP
to RUN is held.
Module data initialization • Dedicated instruction
(GP.PINIT)
• [Cd.2] Module data
initialization request
Initial value (factory default setting value)
Parameter type Extended parameter
storage setting Power-on CPU module status: STOP

RUN
Module Parameter

Parameter stored in the CPU module
*1
Module Extension
Parameter
*1
CPU Module extension parameter stored in the CPU module or SD memory card
Positioning module Module extension parameter stored in the
RD75
*2
