Mitsubishi A1SD75M1, User Manual

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12 - 56
MELSEC-A
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 " Cd.101
Torque output setting value" that was set in the axis control data. 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
(2) Precautions during control
(3) Setting the torque change function start signal
(1) Control details
The following drawing shows the torque change operation.
Various operations
PLC READY signal [Y1D] OFF
ON
V
t
100%
75%
0%
0%
Cd.30 New torque value
100% 50% 75% 50%
50% 100%
Cd.101 Torque output setting value
Torque is limited at the torque
output setting value (50%) of
the axis control data.
Torque is limited at the new
torque value (75%) of the
axis control data. Torque is limited at the torque
output setting value (50%) of
the axis control data.
Torque limit setting value Pr.18
Torque limit stored value Md.45
Fig. 12.30 Torque change operation