Mitsubishi Electric MELSEC iQ-R RD75P4, User Manual

Page: 237 / 598

7 CONTROL SUB FUNCTIONS
7.4 Function to Limit Control
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7
Software stroke limit function
In this function, the address established by the machine OPR is used to set the upper/lower limits of the movable range of the
workpiece. If a movement command is issued to an address outside the set range, the command is not performed. In the
RD75, Current feed value and Machine feed value are used as the addresses indicating the current value. Select one of the
addresses used for the limit check and set a value in [Pr.14] Software stroke limit selection.
For details on Current feed value and Machine feed value, refer to the following.

Page 72 Checking the current value
The upper and lower limits of the movable range of the workpiece are set in [Pr.12] Software stroke limit upper limit value or
[Pr.13] Software stroke limit lower limit value.
Differences in the movable range
The following figure shows the movable range of the workpiece when the software stroke limit function is used.
The following figures show the differences in the operation when [Md.20] Current feed value and [Md.21] Machine feed value
are used for the movable range limit check.
■
Condition
Assume that the current stop position is 2000 and the upper stroke limit is set to 5000.
FLS RLS
Workpiece movement range
Software stroke limit (lower limit)
Software stroke limit (upper limit)
5000
5000
2000
2000
Md. 20
Md. 21
Upper stroke limit
Stop position
Movement range
Current feed value
Machine feed value