Filter
Top Products
12 - 27
MELSEC-Q
12 CONTROL SUB FUNCTIONS
[4] Setting the torque limit function
(1) To use the "torque limit function", set the "torque limit value" in the
parameters shown in the following table, and write them to the QD75MH.
a) The set details are validated at the rising edge (OFF
ON) of the PLC
READY signal (Y0).
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.17
Torque limit
setting value
Set the torque limit value as a percentage. 300
Pr.54
OPR torque limit
value
Set the torque limit value after the "
Pr.47
Creep
speed" is reached. Set as a percentage.
300
b) The set details are validated at the rising edge (OFF ON) of the
positioning start signal (Y10).
Setting item
Setting
value
Setting details
Factory-set
initial value
Cd.101
Torque output
setting value
Set the torque output setting value as a percentage. 0
Refer to Section 5.2 "List of parameters" for setting details.
Torque limit value: Will be an upper limit value of the torque change value. Even if a larger value
has been mistakenly input for the torque change value, it is restricted within the torque limit setting
values to prevent an erroneous entry. (Even if a value larger than the torque limit setting value has
been input to the torque change value, the torque value is not changed.)
Torque output setting value: to be taken at the start of positioning, and used as a torque limit value.
If the value is "0" or larger than the torque limit setting value, the parameter "torque limit setting
value" is taken at the start.
(2) The "torque limit value" set in the QD75MH is set in the "
Md.35
Torque
limit stored value".
PLC CPU Baffer memory
Servo amplifier
1525
QD75MH
Torque limit setting value
26
86
1552
826
Torque limit strored value
OPR torque limit value
New torque value
Torque output setting value
Positioning control
Torque limit value
Fig. 12.13 Limiting the torque to the servo amplifier (Axis 1)