Sub Function - Mitsubishi Electric MELSEC-L02SCPU User Manual

7.10

Sub Function

"Sub functions" govern control limitation, addition of function when OPR control, positioning control, and JOG
operation are performed. These sub functions are implemented by setting parameters or in programs.
Sub function
A function to perform machine OPR automatically by detecting an off edge of the
OPR retry function limit signal and moving to a position where machine OPR is possible, even when
the OP is not located in the OPR direction
A function to limit the speed to within the setting range of speed limit when the
Speed limit function
operating speed exceeds the positioning parameter "Speed Limit Value"
Speed change function A function to change the speed during operation
A function to not start operation when a start instruction is given to move to the
Software stroke limit target position which is outside the range set by the upper stroke limit and lower
function stroke limit. The limit function also stops operation when the current feed value
deviates from the setting range.
Hardware stroke limit A function to decelerate the axis to a stop using a limit switch connected to the
function connector for external devices
Target position change
A function to change the target value during positioning control.
function
Acceleration/deceleration
A function to adjust the acceleration/deceleration processing as part of control
processing function
A function to control the stopping method to be applied when a stop cause occurs
Stop processing function
during operation
Note that the explanations in this section assume use of Axis 1. For the special relay, special register, dedicated
instructions, error codes, and warning codes for Axis 2, refer to the following.
• Special relay and special register:  Page 62, Section 7.4 (2)
• Dedicated instructions:  Page 137, Section 7.12
• Error codes:  Page 173, Section 7.14 (1)
• Warning codes:  Page 177, Section 7.14 (2)
(1) Sub function and external input signal
When the OPR retry function and hardware stroke limit function are used, upper and lower limit signals are
required.
Description
CHAPTER 7 POSITIONING FUNCTION
Reference
Page 110, Section 7.10.1
Page 114, Section 7.10.2
Page 115, Section 7.10.3
Page 120, Section 7.10.4
Page 123, Section 7.10.5
Page 124, Section 7.10.6
Page 128, Section 7.10.7
Page 130, Section 7.10.8
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