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3. SPECIFICATIONS
MELSEC-A
(a) Changing a positioning address (travel distance)
If data is written in a travel distance
change area (buffer memory
address, X axis: addresses 203,204 and
Y
axis: addresses
503
and
504) before a control switching signal is input, a travel distance can
be changed during BUSY.
X axis travel distance change area
Address
*03
F ]
204
Travel distance change (PI)
Positioning address
Control switching signal
Setting
travel
distance
area
0
x
P1
Fig.
3.23
Positioning Address Switch Timing
POINTS
I
When data is written in a travel distance change area from a PC CPU
with a sequence program, the
OS recognizes a travel distance re-
quest.
A
travel distance change is valid until a control switch signal is input
during BUSY in the speed/positioning control switching mode.
If
data is not written to the travel distance change area, a positioning
address that corresponds to the data number specified when starting
is used as the travel distance.
3
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40
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