Functions To Limit The Control; Speed Limit Function - Mitsubishi Electric MELSEC-LD77MS2 User Manual

13.4 Functions to limit the control

13.4.1 Speed limit function

Functions to limit the control include the "speed limit function", "torque limit function",
"software stroke limit function", "hardware stroke limit function", and "forced stop
function". Each function is executed by parameter setting or sequence program
creation and writing.
The speed limit function limits the command speed to a value within the "speed limit
value" setting range when the command speed during control exceeds the "speed limit
value".
The details shown below explain about the "speed limit function".
[1] Relation between the speed limit function and various controls
[2] Precautions during control
[3] Setting the speed limit function
[1] Relation between the speed limit function and various controls
The following table shows the relation of the "speed limit function" and various
controls.
Control type
Machine OPR control
OPR
control
Fast OPR control
Position
control
Major
positioning
control
1 to 4-axes Speed control
Speed-position switching control,
Position-speed switching control
Other
control
JOG operation, Inching operation
Manual
control
Manual pulse generator operation
Expansion
Speed-torque control
control
: Always set
– : Setting not required (Use the initial value or a value within the setting range.)
1-axis linear control
2 to 4-axes linear
interpolation control
1-axis fixed-feed control
2 to 4-axes fixed-feed
control (interpolation)
2-axis circular interpolation
control
Current value changing
JUMP instruction, NOP
instruction, LOOP to
LEND
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Chapter 13 Control Sub Functions
Speed limit function Speed limit value
Pr.8
–
Setting value invalid
–
Pr.31
– Setting is invalid
Pr.8
Speed limit value
JOG speed limit
value
Speed limit value