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MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
954
Deceleration time 2
setting error
The set range of the detailed
parameter 2 "Deceleration time 2" is
outside the setting range.
955
Deceleration time 3
setting error
The set range of the detailed
parameter 2 "Deceleration time 3" is
outside the setting range.
956
JOG speed limit
value error
• The set range of the detailed
parameter 2 "JOG speed limit value"
is outside the setting range.
• The set range of the detailed
parameter 2 "JOG speed limit value"
exceeds the speed limit.
957
JOG acceleration
time selection setting
error
The set range of the detailed parameter
2 "JOG acceleration time selection
setting" is outside the setting range.
958
JOG deceleration
time selection setting
error
The set range of the detailed parameter
2 "JOG deceleration time selection
setting" is outside the setting range.
959
Acceleration/
deceleration process
selection setting
error
The set range of the detailed
parameter 2 "Acceleration/deceleration
process selection setting" is outside
the setting range.
960
S-pattern ratio
setting error
The set range of the detailed
parameter 2 "S-pattern ratio" is outside
the setting range.
961
Illegal sudden stop
deceleration time
The set range of the detailed
parameter 2 "Sudden stop deceleration
time" is outside the setting range.
962
Stop group 1 sudden
stop selection error
The set range of the detailed
parameter 2 "Stop group 1 sudden
stop selection" is outside the setting
range.
963
Stop group 2 sudden
stop selection error
The set range of the detailed
parameter 2 "Stop group 2 sudden
stop selection" is outside the setting
range.
964
Stop group 3 sudden
stop selection error
The set range of the detailed
parameter 2 "Stop group 3 sudden
stop selection" is outside the setting
range.
966
Outside allowance
circular interpolation
error width
The set range of the detailed
parameter 2 "Allowance circular
interpolation error width" is outside the
setting range.
967
External command
function selection
error
The set range of the detailed
parameter 2 "External command
function selection" 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.)
Parameter
980 OPR method error
The set range of the OPR basic
parameter "OPR method" is outside
the setting range.
The QD75 READY signal (X0) is not
turned ON.