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MELSEC-Q
11 MANUAL CONTROL
11.3.2 Inching operation execution procedure
The inching operation is carried out by the following procedure.
STEP 1
Preparation
Refer to Chapter 5
and Section 11.3.3.
End of control
Set the parameters.
STEP 2
Refer to Section
11.3.4.
STEP 3
Write the sequence program created in STEP 1 and
STEP 2 to the PLC CPU using GX Developer.
Turn ON the JOG start signal.
STEP 4
One of the following two methods can be used.
<Method 1>
Monitor using GX Configurator-QP.
<Method 2>
Monitor using GX Developer.
One of the following two methods can be used.
<Method 1>
Directly set (write) the parameters in the QD75 using GX
Configurator-QP.
<Method 2>
Set (write) the parameters from the PLC CPU to the QD75 using
the sequence program (TO command).
STEP 5
Create a sequence program in which the "JOG start
signal" is turned ON by an inching operation start
command.
Using GX Developer, set the control data and create a
sequence program for executing the inching
operation.
(Set the control data in the QD75 buffer memory using the TO
command.)
Write the sequence program to the PLC CPU.
Turn ON the JOG start signal of the axis to be started.
Monitoring of the
inching operation
STEP 6
Turn OFF the JOG operation start signal that is ON.
Monitor the inching operation status.
Forward run JOG start signal
Reverse run JOG start signal
Axis 1
Y8
Y9
YA
YB
YC
YD
Refer to Chapter 6.
Axis 3
Axis 2
Inching operation
start
Inching operation
stop
to
)
Pr.1
)
Pr.31
Set the " Cd.16 inching movement amount".
(Control data setting)
YE
YF
Axis 4
End the inching operation after moving a workpiece
by an inching movement amount with the sequence
program created in STEP 2.
REMARK
•
Mechanical elements such as limit switches are considered as already installed.
•
Parameter settings work in common for all control using the QD75.