Mitsubishi Electric MELSEC-L LD75D, User Manual

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651
CHAPTER 15 TROUBLESHOOTING
15
15.
5
List
of
E
rrors
Common
104 Hardware stroke limit (+)
■
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.)
■
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)
■ 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.
■
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.
105 Hardware stroke limit (-)
■
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.)
■
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)
■ 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.
■
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.
106 Stop signal ON at 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.
■
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)
107
READY OFF

ON
during BUSY
■ 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.
■
Action
Turn ON the PLC READY signal (Y0) with the
BUSY signals of all axes OFF.
Classification
of errors
Error
code
Error name Operation status at error occurrence
Action/Related buffer memory address/Set
range (Setting with program)