Precautions - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.31 Constant Torque Control

14.31.4 Precautions

(1) The NC command position and feedback position are different while constant torque control is in operation. Do not apply
constant torque control to axes actually processing workpieces. Set "2296 SV096 (TQC) (Constant torque stopper con-
trol)" to "0" for axes that are not to receive the constant torque control and proportional torque stopper control.
(2) The constant torque control cannot operate on axes for which the "2296 SV096 (TQC) (constant torque stopper control)"
is set to "0". Instead, the operation error (M01 1114) occurs. The operation error can be cleared by performing a reset or
turning OFF the bits for which the constant torque control request axis signal error is generated.
(3) The proportional torque stopper control cannot operate on axes for which the "2296 SV096 (TQC) (constant torque stop-
per control)" is set to "0". Instead, the operation error (M01 1115) is generated. The operation error can be cleared by per-
forming a reset or turning OFF the bits for which the proportional torque stopper control request axis signal error is
generated.
(4) The constant torque control cannot operate on axes currently moving due to manual operation or cycle operation.
Instead, the operation error (M01 1114) occurs. The operation error can be cleared by performing a reset or turning OFF
the bits for which the constant torque control request axis signal error is generated. The constant torque control cannot be
canceled by manual operation or cycle operation if axes are currently under the constant torque control. Instead, the
operation error (M01 1114) occurs. The constant torque control will cancel and the operation error will clear after comple-
tion of the movement command or by a reset.
(5) The proportional torque stopper control cannot operate on axes currently moving due to manual operation or cycle oper-
ation. Instead, the operation error (M01 1115) is generated. The operation error can be cleared by performing a reset or
turning OFF the bits for which the proportional torque stopper control request axis signal error is generated. The com-
mand to transition to the proportional torque stopper control also cannot be output. Instead, the operation error (M01
1115) is generated.
(6) The proportional torque stopper control cannot operate on axes under the constant torque control. Instead, the operation
error (M01 1115) is generated. The constant torque control cannot operate on axes under the proportional torque stopper
control. Instead, the operation error (M01 1114) occurs.
(7) The droop cancel under constant torque control cannot operate on axes not under constant torque control. The droop
cancel under constant torque control cannot operate on axes currently moving due to manual operation or cycle opera-
tion. Instead, the operation error (M01 1116) is generated. The operation error can be cleared by performing a reset or
turning OFF the bits for which the constant torque droop cancel request axis signal error is generated.
(8) Axes under the droop cancel under constant torque control cannot move due to manual operation or cycle operation.
Instead, the operation error (M01 1117) is generated. The operation error is cleared by performing a reset. Note that the
droop cancel under constant torque control is not canceled.
(9) The constant torque control or proportional torque stopper control is not canceled even if an emergency stop is performed
while the constant torque control or proportional torque stopper control is in operation. Note, however, that the droop can-
cel under constant torque control does cancel if an emergency stop is performed while the droop cancel under constant
torque control is in operation. Note that the droop cancel under constant torque control is not re-enabled after the emer-
gency stop is cleared. You must turn the request signal OFF and ON again.
(10) The constant torque control or proportional torque stopper control is not canceled even if a servo OFF signal is output for
axes under the constant torque control or proportional torque stopper control. Servo OFF signals also cannot be output
for axes under droop cancel under constant torque control.
(11) When changing the "2296 SV096 (TQC) (constant torque stopper control)", "#2297 SV097 (TCout) (constant torque con-
trol torque clear slope)", and "2298 SV098 (TCup) (output slope of constant torque stopper control)", rewrite the servo
parameters for the specified axes before turning ON the proportional torque stopper control request signal.
(12) Adjust the detection amplitude for axes to receive constant torque control or proportional torque stopper control to prevent
false detections of excessive variance alarms due to play produced during the pressing process as well as false detec-
tions of abnormality in detected magnetic position alarms.
(13) Do not perform the constant torque control or proportional torque stopper control for superimposed or synchronized refer-
ence axes. Synchronization between part systems may be lost as the synchronized axis is not updated with the axial
movement caused by constant torque or proportional press torque.
IB-1501668-B 788