Module Data Initialization Function - Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual

8.2

Module Data Initialization Function

This function sets module parameters and module extension parameters (positioning data and block start data) in the buffer
memory of the RD75 and setting values in the module extension parameter file to their factory default settings.
Module data initialization means
This function is executed with a program.
Control details
The following table lists the parameters that are initialized with the module data initialization function.
*1
Parameter
Module parameter
Module extension parameter
*1 For the parameter file, refer to the following.
Page 488 Parameter Reflection
*2 The storage destination of module extension parameters is specified by the extension parameter storage setting. For details, refer to the
following.
Page 487 Extended parameter storage setting
*3 The module data initialization can be performed only while the CPU module status is STOP.
Control precautions
• Execute the module data initialization function only when the positioning control is not performed (when PLC READY signal
[Y0] is off). If the initialization is executed while PLC READY signal [Y0] is on, PLC READY ON write (Warning code:
0905H) will occur.
• Writing to the flash ROM can be executed up to 100000 times. If the number of writing to the flash ROM exceeds 100000
times, writing data to the flash ROM may become impossible and Flash ROM write error (Error code: 1931H) will occur.
• After the parameter initialization is performed, powering off and on the system again or resetting the CPU module is
required.
• If an error occurs on the parameter set in the RD75 when PLC READY signal [Y0] is turned on, RD75 READY signal [X0]
will not turn on and the control cannot be performed.
• The number of module data initializations using a program after the power is turned on once or the CPU module is reset is
limited to up to 25 times (including the number of executions of the module data backup function). If the writing operation is
executed 26th times, Flash ROM write number error (Error code: 1080H) will occur. If this error occurs, reset the error,
power off and on the module again, or reset the CPU module.
Control 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.
• The module data initialization processing takes about 10 to 30 seconds. Do not turn on and off the power or reset the CPU
module during the module data initialization processing. Doing so cancels the flash ROM write and the backed up data will
be lost.
8 COMMON FUNCTIONS
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8.2 Module Data Initialization Function
Extension parameter storage setting
CPU module
The module parameters in the buffer memory are initialized.
The module extension parameters in the buffer memory are initialized.
The module extension parameter file in the CPU module
*3
is initialized.
*2
Positioning module
The module extension parameter file in the positioning
module is initialized.