Mitsubishi Electric MELSEC-L LD75P User Manual page 653

Classification Error
Error name
of errors code
104 Hardware stroke limit (+)
Common
105 Hardware stroke limit (-)
106 Stop signal ON at start
READY OFF  ON
107
during BUSY
Operation status at error occurrence
■Description
The upper limit signal (FLS) turned OFF during
operation.
■Operation status at error occurrence
The system stops with the setting (deceleration
stop/sudden stop) of the detailed parameter 2
Sudden stop selection (stop group 1). (Note that the
deceleration stop only occurs during the manual
pulse generator operation.)
■Description
The start of an operation is requested when the
hardware stroke limit (upper limit signal FLS) is
OFF.
■Operation status at error occurrence
The system does not start.
■Description
The lower limit signal (RLS) turned OFF during
operation.
■Operation status at error occurrence
The system stops with the setting (deceleration
stop/sudden stop) of the detailed parameter 2
Sudden stop selection (stop group 1). (Note that the
deceleration stop only occurs during the manual
pulse generator operation.)
■Description
The start of an operation is requested when the
hardware stroke limit (lower limit signal RLS) is
OFF.
■Operation status at error occurrence
The system does not start.
■Description
The start of an operation is requested when the
stop signal is ON.
■Operation status at error occurrence
The system does not start.
■Description
The PLC READY signal is turned from OFF to ON
when BUSY signal is turned ON.
■Operation status at error occurrence
The LD75 READY signal (X0) does not turns ON.
CHAPTER 15 TROUBLESHOOTING
Action/Related buffer memory address/Set
range (Setting with program)
■Action
Reset an axis error. ( Page 649, Section
15.4.3)
After that, perform manual control operation to
move the axis to the position where the upper
limit signal (FLS) will not turn OFF. ( Page
479, CHAPTER 11)
■Action
• Check the wiring of the upper limit signal (FLS).
• Check that the limit switch specifications meet
the setting of "[Pr.22] Input signal logic
selection".
• In a system which does not require a hardware
stroke limit (limit switch), wire the system so
that the upper limit signal (FLS) input of the
LD75 is always ON.
■Action
Reset an axis error. ( Page 649, Section
15.4.3)
After that, perform manual control operation to
move the axis to the position where the lower limit
signal (RLS) will not turn OFF. ( Page 479,
CHAPTER 11)
■Action
• Check the wiring of the lower limit signal (RLS).
• Check that the limit switch specifications meet
the setting of "[Pr.22] Input signal logic
selection".
• In a system which does not require a hardware
stroke limit (limit switch), wire the system so
that the lower limit signal (RLS) input of the
LD75 is always ON.
■Action
The start timing is reviewed so that the operation
starts after the stop command is reset.
Output signals to LD75  Axis 1: Y4, Axis 2: Y5,
Axis 3: Y6, Axis 4: Y7
External input  Connectors for external devices:
Stop signals (STOP)
■Action
Turn ON the PLC READY signal (Y0) with the
BUSY signals of all axes OFF.
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