Mitsubishi Electric MELSEC iQ-FX5 User Manual page 584

Warning code Warning name
(Hexadecimal)
0939H Outside mark
detection data buffer
memory No. setting
range
093CH Home position return
data incorrect
093EH SSCNET
communication error
0980H Speed change during
deceleration
0981H JOG speed limit
value
0988H Outside manual
pulse generator input
magnification range
0990H Deceleration/stop
speed change
12 TROUBLESHOOTING
582
12.4 List of Warning Codes
Error details and causes
When the mark detection data type setting is "Optional 2
word buffer memory", the mark detection data buffer
memory No. is outside the range or odd number.
[Operation status at warning occurrence]
The setting No. of which the mark detection setting
parameter is outside the range is invalid.
• The backup data for absolute position restoration is
illegal.
• The home position return has never been executed
after the system start.
• The home position return is started, but not completed
correctly.
• "Absolute position erased" in the driver is detected.
• "Rotation direction selection (PA14)" of the servo
parameter has been changed.
[Operation status at warning occurrence]
The operation continues.
Data received from servo amplifier is in error.
[Operation status at warning occurrence]
The operation continues.
The speed change request is issued during deceleration
stop with JOG start signal OFF.
[Operation status at warning occurrence]
The speed change is not carried out.
*2
• The JOG speed exceeds the JOG speed limit value
at start.
*2
• The new speed value exceeds the JOG speed limit
value when the speed is changed during operation.
[Operation status at warning occurrence]
• When the speed exceeds the JOG speed limit, the
JOG operation is carried out with the JOG speed limit
value.
• While the speed is limited by the JOG speed limit
value, the "[Md.39] In speed limit flag" is turned ON.
The manual pulse generator 1 pulse input magnification
is set to 0, 10001 or more, or negative value.
[Operation status at warning occurrence]
• When input magnification is set at 10001 or more, or
negative value: Re-set to 10000.
• When input magnification is set at 0: Re-set to 1.
The speed change request is issued during deceleration
stop.
[Operation status at warning occurrence]
The speed change is not carried out.
Remedy
Set a value with an even number within the setting
range.
Execute home position return.
• Check the SSCNET cable.
• Check the servomotor and encoder cable.
• Take measures against noise.
• Check whether the rotation direction selection/travel
direction selection (PA14) is set "0  1" or "1  0"
in the program or the engineering tool.
Do not carry out the JOG speed change during
deceleration with the JOG start signal OFF.
Set a value within the setting range.
Set the manual pulse generator 1 pulse input
magnification to within the setting range.
Do not carry out the speed change during deceleration
with a stop command, during stoppage, or during
automatic deceleration with position control.