Mitsubishi A1SD75P1-S3, User Manual

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12 - 26
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
(4) Setting the torque limit function
(a) To use the "torque limit function", set the "torque limit value" in the
parameters shown in the following table, and write them to the AD75.
The set details are validated at the rising edge (OFF ON) of the PLC
READY signal (Y1D).
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.18
Torque limit
setting value
Set the torque limit value as a percentage. 300
Pr.56
Zero point return
torque limit value Set the torque limit value after the " Pr.49 Creep
speed" is reached. Set as a percentage.
300
* Refer to section "5.2 List of parameters" for setting details.
(b) The "torque limit value" set in the AD75 is set in the " Md.45 Torque limit
stored value". The " Md.45 Torque limit stored value" in the sequence
program is transferred to the "D/A converter module", and the torque is
limited.
PLC CPU
Buffer memory Drive unit
Writing by a
TO command
Stored torque
limit value
826
D/A convertor module
Reading by a
FROM command
AD75
Torque limiting
Positioning control
Fig. 12.14 Limiting the torque to the drive unit
The following table shows the " Md.45 Torque limit stored value" of the
buffer memory address.
Buffer memory address
Monitor item
Monitor
value
Storage details
Axis 1 Axis 2 Axis 3
Md.45
Torque limit
stored value The "torque limit value" valid at that time is
stored. (
Pr.18 , Pr.56 , or Cd.30 )
826 926 1026
* Refer to section "5.6 List of monitor data" for information on the setting details.
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with the AD75
software package. Execution by sequence program uses many sequence
programs and devices. The execution becomes complicated, and the scan times
will increase.
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