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MELSEC-Q
10. POSITIONING DEBUGGING
DISPLAY/SETTING DATA
Item Description
Title bar Shows the I/O address of the QD75 being monitored.
Target value
Shows the destination for positioning control.
For velocity/position switching control or position/velocity switching control, "0" is displayed
for velocity control and the destination appears for position control.
"0" is shown for other operations.
Buffer memory address (Axis #1): 818, 819
Machine feed value
Indicates the current position whose original point is the inherent position determined by the
machine (mechanical coordinates).
On completion of OPR, this value indicates the original point address.
Buffer memory address (Axis #1): 802, 803
Present value change
address
Shows the feed present value changed with the positioning start No. 9003.
Buffer memory address (Axis #1): 1506, 1507
Velocity change value
Shows the value of speed change made during positioning operation or JOG operation.
Buffer memory address (Axis #1): 1514, 1515
Operational speed override
Indicates the override speed set in the sequence program.
Buffer memory address (Axis #1): 1513
Step mode
Indicates the type of the step operation set in the sequence program.
Buffer memory address (Axis #1): 1544
Step valid flag
Shows that the step operation set in the sequence program is valid.
(ON) indicates that the step operation is valid.
Buffer memory address (Axis #1): 1545
Velocity change in
progress flag
Shows (ON) during speed changing.
Buffer memory address (Axis #1): 831
Velocity change 0 flag
Shows
(ON) when the speed is changed to 0 for speed changing.
Buffer memory address (Axis #1): 817
External REQ valid
Shows that the external command signal set in the sequence program is valid.
(ON) indicates that the start, velocity/position switching or position/velocity switching by
the external command signal is valid.
Buffer memory address (Axis #1): 1505
Skip command
Indicates the skip command given in the sequence program.
Shows
(ON) when the skip command is given.
Buffer memory address (Axis #1): 1547