Mitsubishi Electric MELSEC-Q Series User Manual page 635

[Conditions]
Assume the current stop position is 2000, and the upper stroke limit is set to 5000.
Md. 20 Feed current value
Md. 21 Feed machine value
[Current value changing]
When the current value is changed by a new current value command from 2000 to 1000, the
current value will change to 1000, but the feed machine value will stay the same at 2000.
1) When the feed machine value is set at the limit
The feed machine value of 5000 (feed current value: 4000) becomes the upper stroke limit.
Md. 20 Feed current value
Md. 21 Feed machine value
2) When the feed current value is set at the limit
The feed current value of 5000 (feed machine value: 6000) becomes the upper stroke limit.
Md. 20 Feed current value
Md. 21 Feed machine value
Fig. 13.14 Software stroke limits of the feed current value and feed machine value
POINT
When "feed machine value" is set in "[Pr.14] Software stroke limit selection", the
moveable range becomes an absolute range referenced on the HP. When "feed
current value" is set, the moveable range is the relative range from the "feed
current value".
The following drawing shows the differences in the operation when "[Md.20]
Feed current value" and "[Md.21] Feed machine value" are used in the moveable
range limit check.
Moveable range
Moveable range
2000
2000
Stop position
1000
2000
Upper stroke limit
Moveable range
1000
2000
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Chapter 13 Control Sub Functions
5000
5000
Upper stroke limit
4000 5000
5000 6000
4000 5000
5000 6000
Upper stroke limit