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MELSEC-Q
13 COMMON FUNCTIONS
13.2 Parameter initialization function
"The parameter initialization function" is used to return the setting data set in the QD75
buffer memory and flash ROM to their factory-set initial values.
The details shown below explain about the "parameter 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 program.
• Initialization is executed by peripheral device.
Refer to GX Configurator-QP Operating Manual for the execution method by
peripheral device.
[2] Control details
The following table shows the setting data initialized by the "parameter
initialization function".
(The data initialized are "buffer memory" 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 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 a flash
ROM write error (error code: 801) will occur.
(3) A "PLC CPU reset" or "PLC power restart" must be carried out after the
parameters are initialized.
(4) If an error occurs on the parameter set in the QD75 when the PLC READY
signal [Y0] is turned ON, the QD75 READY signal [X0] will not be turned ON
and the control cannot be carried out.
Important
Parameter initialization takes about 10 seconds. (Up to 30 seconds are sometimes
required.)
Do not turn the power ON/OFF; reset the PLC CPU, etc., during parameter
initialization. The flash ROM data may be corrupted.