Mitsubishi Electric MELSEC-Q QD75M User Manual page 831

APPENDICES
Trouble type
Error 920 (backlash compensation
amount error) occurs even when
the backlash compensation value
is set to "1".
When a JOG operation is
attempted, errors such as error
104 (hardware stroke limit+) or
error 105 (hardware stroke limit
occur and the machine does not
move.
Error 997 (Speed selection at OP
shift error) appears when the PLC
READY signal [Y0] turns from OFF
Error/warning
to ON.
When the start signal was turned
ON immediately after the stop
signal ON, warning 100 (start
during operation) was detected,
and the start was ignored.
Does warning 500 (deceleration
and stop speed change) occur
only during "stop deceleration" and
"automatically deceleration"?
Is there any problem if the
operation is continued in that state
without resetting the error?
When the position control is
Positioning
carried out, the positioning
completion signal
completion signal is not turned ON.
Questions/Trouble
Appendix - 62
Backlash compensation value
0 ≤
Movement amount per pulse
Setting is not possible if the above equation is not
satisfied.
The hardware stroke limit wiring has probably not been
carried out.
) Refer to section "12.4.4 Hardware stroke limit function" for
details, and wire accordingly.
A value besides "0" or "1" may be set in the
designation during OP shift.
Review the set PLC program, and reset the correct
parameters.
The QD75 starts the deceleration stop process when the
stop signal ON is detected. Thus, the machine interprets
that "positioning is still being executed" immediately after
the stop signal ON. Even if the start signal is turned ON at
that time, the start request will be ignored and warning
100 will occur.
The warning occurs only at those times mentioned at the
left. Because this is a warning, there is no problem if the
operation can be continued without resetting the error.
(When the speed is changed using the override, the new
value will not be reflected on the data being executed, but
will be reflected from the next start.)
The positioning may have not been completed properly
by the occurrence of the stop factor.
Check the axis monitor "
after BUSY signal OFF.
Stopped
During error occurrence : An error occurred during
The setting value for detailed parameter 2 "Positioning
completion signal output time" is 0 or shorter than scan
time.
Set the properly detectable time using the PLC program.
MELSEC-Q
Remedy
≤ 65535
Pr.56
Md.26
axis operation state"
: The stop signal is turned ON
during positioning.
Check the condition of the stop
signal (Y stop or external stop)
ON.
positioning.
Check the cause of error
Md.23
occurrence from "
error number".
No.
46
47
Speed
48
49
50
51
axis
52