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MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error
Operation status at error
occurrence
922
Software stroke limit
lower limit
• In the unit of degree, the set range of
the detailed parameter 1 "Software
stroke limit lower limit value" is outside
the setting range.
• In a unit other than degree, the
software stroke limit upper limit value
is smaller than the software stroke
limit lower limit value.
923
Software stroke limit
selection
The set range of the detailed parameter
1 "Software stroke limit selection" is
outside the setting range.
924
Software stroke limit
valid/invalid setting
The set range of the detailed parameter
1 "Software stroke limit valid/invalid
setting" is outside the setting range.
925
Command
in-position width
The set range of the detailed parameter
1 "Command in-position width" is
outside the setting range.
926
Illegal torque limit
setting value
The set range of the detailed parameter
1 "Torque limit setting value" is outside
the setting range.
927
M code ON timing
error
The set range of the detailed parameter 1
"M code ON signal output timing" is
outside the setting range.
928
Speed changeover
mode error
The set range of the detailed parameter
1 "Speed changeover mode" is outside
the setting range.
929
Interpolation speed
designation method
error
The set range of the detailed parameter
1 "Interpolation speed designation
method" is outside the setting range.
930
Current value update
request error
The set range of the detailed parameter
1 "Current feed value during speed
control" is outside the setting range.
932
Manual pulse
generator input
mode error
The set range of the detailed parameter
1 "Manual pulse generator input
selection" is outside the setting range.
935
Speed-position
function selection
error
The detailed parameter 1 "speed-
position function selection" is preset to
2 and the following three conditions are
not satisfied:
1) Unit is "degree".
2) Software stroke limits are invalid.
3) Update current feed value.
The QD75 READY signal (X0) is
not turned ON.
950
Acceleration time 1
setting error
The set range of the detailed parameter
2 "Acceleration time 1" is outside the
setting range.
951
Acceleration time 2
setting error
The set range of the detailed parameter
2 "Acceleration time 2" is outside the
setting range.
952
Acceleration time 3
setting error
The set range of the detailed parameter
2 "Acceleration time 3" is outside the
setting range.
Parameter
953
Deceleration time 1
setting error
The set range of the detailed parameter
2 "Deceleration time 1" is outside the
setting range.
At start: The system will not
operate.
During operation:
The system stops with the
setting (deceleration
stop/sudden stop) of the
detailed parameter 2
sudden stop selection
(stop group 3).
(Note that the deceleration stop
only occurs during the manual
pulse generator operation.)