Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 16 Troubleshooting
Classification
of warnings
Warning
code
Warning name Warning Operation status at warning occurrence
518
Target position change
not possible
• A target position change request was
given for the control system other than
ABS1 and INC1.
• A target position change request is
turned ON during continuous path
control.
• A new target position address is outside
the software stroke limit range.
• A target position change request was
given during deceleration to a stop.
• A target position change request was
issued when speed change 0 flag
(
Md.31
Status: b10) was ON.
• A target position change request was
given during speed control mode, torque
control mode or continuous operation to
torque control mode.
The target position change is not carried
out.
520 Torque limit value over
• A value exceeding "
Pr.17
Torque limit
setting value
" is set to "
Cd.143
Command
torque at torque control mode
" at torque
control mode.
• A value exceeding "
Pr.17
Torque limit
setting value
" is set to "
Cd.150
Target torque
at continuous operation to torque control
mode
" at continuous operation to torque
control mode.
The torque is controlled with the torque
limit setting value.
Positioning
operation
warnings
521
Torque initial value
selection invalid
• The servo parameter "Function selection
C-B POL reflection setting selection
during torque control (PC29)" is "0: Valid"
on the axis that set feedback torque into
the torque initial value selection.
The initial value selection is controlled as
the command torque.