Mitsubishi Electric MELSEC-LD77MS2 User Manual page 803

[3] Precautions during control
Important
Parameter initialization takes about 10 seconds. (Up to 30 seconds are sometimes
required.)
Do not turn the power ON/OFF or reset the PLC CPU during parameter
initialization. If the power is turned OFF or the PLC CPU module is reset to forcibly
end the process, the data backed up in the flash ROM/internal memory
(nonvolatile) will be lost.
[4] Parameter initialization method
Setting item
Parameter
initialization
Cd.2
request
: Refer to Section 5.7 "List of control data" for details on the setting details.
(1) Parameter initialization is only executed when the positioning control is not
carried out (when the PLC READY signal [Y0] is OFF).
The warning "In PLC READY" (warning code: 111) will occur if executed
when the PLC READY signal [Y0] is ON.
(2) Writing to the flash ROM is up to 100,000 times. If writing to the flash ROM
exceeds 100,000 times, the writing may become impossible, and the error
"Flash ROM write error" (error code: 801) will occur.
(3) A "PLC CPU reset" or "PLC CPU power restart" must be carried out after
the parameters are initialized.
(4) If an error occurs on the parameter set in the Simple Motion module when
the PLC READY signal [Y0] is turned ON, the READY signal [X0] will not be
turned ON and the control cannot be carried out.
(1) Parameter initialization is carried out using the dedicated instruction
"ZP.PINIT".
(Refer to Chapter 15 "Dedicated Instructions" for details.)
(2) Parameter initialization can also be carried out by the writing of the data
shown in the table below to the buffer memory of Simple Motion module
using the TO command/intelligent function device.
The initialization of the parameter is executed at the time point the data is
written to the buffer memory of Simple Motion module.
Setting
value
1 Set "1: Requests parameter initialization.".
When the initialization is complete, "0" will be set in "
" by the Simple Motion module automatically.
request
Setting details
14 - 5
Chapter 14 Common Functions
Buffer memory address
LD77MS2
LD77MS16
LD77MS4
1901
Parameter initialization
Cd.2
5901