Torque Change Function - Mitsubishi Electric A1SD75P1-S3 User Manual

12 CONTROL AUXILIARY FUNCTIONS

12.5.4 Torque change function

The "torque change function" is used to change the torque limit value during torque
limiting.
The torque limit value during torque limiting is normally the value set in the " Pr.18
Torque limit setting value" that was previously set in the parameters. However, by
setting the new torque limit value in the positioning data " Cd.30 New torque value",
and writing it to the AD75, the torque generated by the servomotor during control can
be limited with the new torque value.
(The " Cd.30 New torque value" is validated when written to the AD75.)
The details shown below explain about the "control torque change function".
(1) Control details
Various operations
PLC READY signal
Pr.18 Torque limit setting value
Cd.30 New torque value
Md.45 Torque limit stored value
(2) Precautions during control
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(1) Control details
(2) Precautions during control
(3) Setting the torque change function start signal
The following drawing shows the torque change operation.
V
ON
[Y1D]
OFF
100% 50%
0%
Torque is limited by the torque
limit setting value (50%) of the
parameters.
100% 50%
Fig. 12.30 Torque change operation
(a) If a value besides "0" is set in the " Cd.30 New torque value", the torque
generated by the servomotor will be limited by that value. To limit the torque
with the value set in " Pr.18 Torque limit setting value", set the " Cd.30
New torque value" to "0".
(b) The " Cd.30 New torque value" is validated when written to the AD75.
(c) If the setting value is outside the setting range, a warning "Outside torque
change value range" (warning code: 113) will occur and the torque will not
be changed.
25%
Torque is limited by the torque
limit setting value (25%) of the
axis control data.
25%
12 - 48
MELSEC-A
t
0%
25%