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8 ZERO POINT RETURN CONTROL
Positioning start
[Y10,Y11,Y12]
signal
[X4,X5,X6]
BUSY signal
Start complete signal
[X1,X2,X3]
Md.35 Axis operation status
Output pulse to external source
(PULSE)
Positioning operation
Fig. 8.16 Operation timing and processing time of high-speed zero point returns
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Operation timing and processing time of high-speed zero point returns
The following shows details about the operation timing and time during high-speed
zero point returns
t1
Standing by
In zero point return
t2
Normal timing time
t1
5 to 15
•
The t1 timing time could be delayed by the following factors.
1) Presence of FROM/TO command execution during start process
2) Operation state of other axes
3) Presence of intervention from peripheral device during start process
4) Details of positioning data to be started
Operating restrictions
When the zero point return complete flag ( Md.40 Status: b3) is ON, executing a
high-speed zero point return start will result in an error "zero point return request
ON" (error code: 207)".
t3
Standing by
Unit: ms
t2
t3
0 to 3.5
8 - 21
MELSEC-A
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