Mitsubishi Electric MELSEC iQ-F FX5 - 34 TROUBLESHOOTING; 34.1 LED Status During Pulse Output and Rotation Direction Output

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34 TROUBLESHOOTING
34.1 LED Status During Pulse Output and Rotation Direction Output
34 TROUBLESHOOTING
This chapter describes the errors and problems related to the positioning function.
34.1 LED Status During Pulse Output and Rotation
Direction Output
Check the on/off status of LED indicator lamp on the CPU module that indicates the status of the output device (Y) to assess
the positioning operation status. For other LEDs, refer to the following manuals.
MELSEC iQ-F FX5S/FX5UJ/FX5U/FX5UC User's Manual (Hardware)
*1 Only FX5S/FX5U/FX5UC CPU module is supported.
*2 The number in  is first module: 5, second module: 7, third module: 9, fourth module: 11.
The number in  is the head output number for each high-speed pulse input/output module.
Signal CPU module High-speed I/O
positioning
*2
LED status
during
execution of
positioning
instruction
Description
Axis
1
Axis
2
Axis
3
Axis
4
*1
Axis

Axis
+1
Pulse
output
destination
PULSE
(pulse train)
Y0 Y1 Y2 Y3 Y Y+1 Flashing
(turned on and off at
high speed)
The pulse output operation is controlled by the
positioning instruction.
OFF One of the following has occurred:
1) The operation of the positioning instruction is
completed.
2) An error occurred during positioning. The
instruction, therefore, is not being executed.
CW
*1
(forward
pulse train)
Y0 Y1 Y Y+1 Flashing
(turned on and off at
high speed)
Forward operation is being executed for a
positioning instruction.
Reverse pulse train is off.
OFF One of the following has occurred:
1) The operation of the positioning instruction is
completed.
2) An error occurred during positioning. The
instruction, therefore, is not being executed.
Rotation
direction
output
SIGN
(direction)
Y0 to Y17 Y+4 Y+5 ON Forward operation is in execution.
OFF One of the following has occurred:
1) The positioning instruction turns on, and
operation is being performed in the reverse
rotation direction.
2) An error occurred during positioning. The
instruction, therefore, is not being executed.
CCW
*1
(reverse
rotation
pulse train)
Y2 Y3 Y+4 Y+5 Flashing
(turned on and off at
high speed)
Reverse operation is being executed for a
positioning instruction.
Forward pulse train is off.
OFF One of the following has occurred:
1) The operation of the positioning instruction is
completed.
2) An error occurred during positioning. The
instruction, therefore, is not being executed.