Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 14 Common Functions
[3] Precautions during control
(1) Parameter initialization is only executed when the positioning control is not
carried out (when the PLC READY signal [Y0] is OFF).
A warning "In PLC READY (warning code: 111)" will occur if executed when
the PLC READY signal [Y0] is ON.
(2) A 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 "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) When using the QD77MS16, the initial value of QD75MH "0" in "
Pr.80
External input signal selection
" is out of setting range, the setting value is "1"
even executing the initial value setting by this function.
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] QD75MH initial value setting method
(1) QD75MH initial value setting is carried out by the writing of the data shown in
the table below to the QD77MS buffer memory using the TO
command/intelligent function device.
The initialization of the parameter is executed at the time point the data is
written to the QD77MS buffer memory.
Buffer memory address
Setting item
Setting
value
Setting details
QD77MS2
QD77MS4
QD77MS16
Cd.47
Initial value setting
request of QD75MH
1
Set "1" (Requests QD75MH initial value
setting).
1909 5909
: Refer to Section 5.7.1 "System control data" for details on the setting details.
When the initialization is complete, "0" will be set in "
Cd.47
Initial value setting
request of QD75MH
" by the QD77MS automatically.