Torque Limit Function - Mitsubishi Electric MELSEC-LD77MS2 User Manual

13.4.2 Torque limit function

OPR
control
Major
positioning
control
Manual
control
Expansion
control
The "torque limit function" limits the generated torque to a value within the "torque limit
value" setting range when the torque generated in the servomotor exceeds the "torque
limit value".
The "torque limit function" protects the deceleration function, limits the power of the
operation pressing against the stopper, etc. It controls the operation so that
unnecessary force is not applied to the load and machine.
The details shown below explain about the "torque limit function".
[1] Relation between the torque limit function and various controls
[2] Control details
[3] Precautions during control
[4] Setting the torque limit function
[1] Relation between the torque limit function and various controls
The following table shows the relation of the "torque limit function" and various
controls.
Control type
Machine OPR control
Fast OPR control
1-axis linear control
2 to 4-axes linear
interpolation control
Position 1-axis fixed-feed control
control
2 to 4-axes fixed-feed
control (interpolation)
2-axis circular interpolation
control
1 to 4-axes speed control
Speed-position switching control
Position-speed switching control
Current value changing
Other
JUMP instruction, NOP
control
instruction, LOOP to LEND
JOG operation, Inching operation
Manual pulse generator operation
Speed-torque control
: Set when required (Set to " – " when not used.)
– : Setting not required (Use the initial value or a value within the setting range.)
: Shows the torque limit value when "
or "
New reverse torque value
Cd.113
Torque limit
function
–
–
New torque value/forward new torque value
Cd.22
" is set to "0".
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Chapter 13 Control Sub Functions
Torque limit value *
"
Torque limit setting value
Pr.17
"
Torque output setting
Cd.101
".
value
: After the "
Pr.47
is reached, this value
becomes the "
".
torque limit value
"
Torque limit setting value
Pr.17
"
Torque output setting
Cd.101
".
value
Setting value is invalid.
"
Torque limit setting value
Pr.17
"
Torque output setting
Cd.101
".
value
Torque limit value before
switching control mode is
continued.
" or
"
Creep speed
OPR
Pr.54
" or
" or
"