Mitsubishi MELSEC QD75P User Manual page 501

12 CONTROL SUB FUNCTIONS
[4] Setting the torque limit function
Setting item
Torque limit
Pr.17
setting value
OPR torque limit
Pr.54
value
Refer to Section 5.2 "List of parameters" for setting details.
PLC CPU
Monitor item
Torque limit stored
Md.35
value
Refer to Section 5.6 "List of monitor data" for information on the setting details.
(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 QD75.
The set details are validated at the rising edge (OFF
READY signal (Y0).
Setting
value
Set the torque limit value as a percentage.
Set the torque limit value after the " Pr.47
speed" is reached. Set as a percentage.
(2) The "torque limit value" set in the QD75 is set in the "
stored value". The "
program is transferred to the "D/A converter module", and the torque is
limited.
Reading by a
FROM command
826
D/A convertor module
Writing by a
TO command
Fig. 12.14 Limiting the torque to the drive unit (Axis 1)
The following table shows the "
buffer memory address.
Monitor
value
The "torque limit value" valid at that time is
stored. (
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by sequence program uses many sequence programs
and devices. The execution becomes complicated, and the scan times will
increase.
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Setting details
Md.35 Torque limit stored value" in the sequence
QD75
Buffer memory
Positioning control
Stored torque
limit value
Torque limiting
Md.35 Torque limit stored value" of the
Storage details
Pr.17 , Pr.54 , or Cd.22
12 - 25
MELSEC-Q
ON) of the PLC
Factory-set
initial value
300
Creep
300
Md.35
Torque limit
Drive unit
Buffer memory address
Axis Axis Axis
1 2 3
826 926 1026 1126
)
Axis
4