13 - 3
MELSEC-Q
13 COMMON FUNCTIONS
13.2 Parameter initialization function
"The parameter initialization function" is used to return the setting data set in the Q D75
buffer memory and flash ROM to their factory-set in it ial v alu e s.
The details shown below explain about the "param eter initialization function".
[1] Parameter initialization means
[2] Control details
[3] Precautions during control
[4] Parameter initialization method
[1] Parameter initialization means
• Initialization is executed with a sequence progr am.
• Initialization is executed by peripheral de vice.
Refer to GX Configurator-QP Operating Manual for the execution method by
peripheral device.
[2] Control details
The following table shows the setting data in itialized by the "parameter
initialization function".
(The data initialized are "buffer memor y" and " flash ROM " setting data.)
Setting data
Basic parameters ( Pr.1 to Pr.10 )
Detailed parameters ( Pr.11 to Pr.42 , Pr.150 )
OPR basic parameters ( Pr.43 to Pr.48 )
OPR detailed parameters ( Pr.49 to Pr.57 )
Positioning data (No.1 to No.600)
Block start data (No.7000 to No.7004)
[3] Precautions during control
(1) Parameter initializat ion 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 wh en
the PLC READY signal (Y0) is ON.
(2) A writing to the flash ROM is up to 100,000 times. If writing to the flas h ROM
exceeds 100,000 times, the writing may becom e impossible, and a flash
ROM write error (error code: 801) will occur.
(3) A "PLC CPU reset" or "PL C power restart" must be carried out after the
parameters are initialized.
(4) If an error occurs on the parameter se t in the QD75 when the PLC READY
signal [Y0] is turned ON, the QD75 READY signal [X0] will not be tu rned ON
and the control cannot be carried out.
Important
Parameter initialization takes about 10 seco nds. (Up to 30 seconds are sometimes
required.)
Do not turn the power ON/OFF; reset the PLC CPU, e tc., during parameter
initialization. The flash ROM data may be c orrupted.