
B-63943EN-1/02 17.PMC CONTROL FUNCTION
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Maximum feedrate
Specify a maximum feedrate during torque control by using the unit
min
-1
.
When there is no torque generation target or the feedrate exceeds the
specified value during torque control, the alarm (SV0422) is issued.
When updating the maximum feedrate during torque control set in the
torque control mode, set new data on the signals and reverse the
logical state of the axis control command completion signal EBUFg.
Valid data range Unit
1 to +32767 min
-1
NOTE
When a linear motor is used, the unit of data is
cm/min.
Torque data
Specify torque data.
Specify a positive value when the torque direction is positive. Specify
a negative value when the torque direction is negative.
When updating the torque data set in the torque control mode, set new
data on the signals and reverse the logical state of the axis control
command completion signal EBUFg.
Valid data range Unit
-999999999 to +999999999 (9-digit) 0.00001 Nm
NOTE
When a linear motor is used, the unit of data is
0.001N.
(1) Switching from position control to torque control
a. Torque control axis setting
Using bit 7 (TRQMx) of parameter No. 2007, set whether an
axis is to be placed under torque control. Moreover, for an axis
to be placed under torque control, set the torque constant
parameter (No. 2105). The standard value of the motor is
automatically set in this parameter when the power is turned
on after setting bit 1 (DGPR) of parameter No. 2000 to 0.
b. Position management in the torque control mode
Whether to perform follow-up operation in the torque control
mode can be chosen using bit 4 (TQF) of parameter No. 1803.
If follow-up operation is performed (with bit 4 (TQF) of
parameter No. 1803 set to 1), position control is exercised,
regardless of whether the torque control mode is set.
If follow-up operation is not performed (with bit 4 (TQF) of
parameter No. 1803 set to 0), the operation depends on
whether to update the error counter (bit 1 (TRE) of parameter
No. 1805).
If the error counter is updated (with bit 1 (TRE) of parameter
No. 1805 set to 0), the alarm (SV0423) is issued when the