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8 OPR CONTROL
CHAPTER 8 OPR CONTROL
This chapter details the OPR control of the QD70D.
8.1 Outline of OPR control
8.1.1 Two types of OPR control
"OPR control" is exercised to set up a position (= OP) as a reference for carrying out
positioning control.
It is used to return a machine system at any position other than the OP to the OP when
the QD70D issues a "OPR request"* with the power turned ON or others, or after a
positioning control stop.
In the QD70D, the following two types of control are defined as "OPR control" in the
sequence of OPR operation.
Either of these two types of OPR control can be executed by setting the "OPR data",
setting "9000" or "9001" in " Cd. 3 Start method", and turning ON the positioning start
signal.
(1) Establish a positioning control OP
(2) Carry out position control toward the OP
* The "machine OPR control" in (1) above must always be carried out before
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"Machine OPR control" (Start method: 9000)
"Fast OPR control" (Start method: 9001).
executing the "fast OPR control" in (2).
When OPR control is not needed
In the system that does not require OPR control, setting "1" in " Cd. 2 OPR request
flag OFF request" forcibly turns OFF the "OPR request flag" ( Md. 7 Status: b0).
When OPR control is not to be exercised, operation starts using the position at
power-on ( Md. 1 Current feed value) as "0".
Also, the "OPR data ( OPR. 1 to OPR. 10 )" must all be set to the initial values or
the values that will not result in an error.
REMARK
OPR request *
The "OPR request flag" (Md. 7 Status signal: b0) must be turned ON in the
QD70D, and a machine OPR control must be executed in the following cases.
• When the power is turned ON
• When machine OPR control is started
The "OPR request flag" turns OFF and the "OPR complete flag" (Md. 7 Status
signal: b1) turns ON if the machine OPR control is executed and is completed
normally.
MELSEC-Q
8
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