Mitsubishi Electric MELSEC-L LD75D, User Manual

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15.5
List of Errors
The following table shows the error details and corrective actions to be taken when an error occurs.
Classification
of errors
Error
code
Error name Operation status at error occurrence
Action/Related buffer memory address/Set
range (Setting with program)

000 (Normal status)
■
Description

■ Operation status at error occurrence

■ Action

Fatal errors
001 Faults ■ Description
Hardware is faulty.
■
Operation status at error occurrence
The system stops.
■ Action
Check that there is no influence from noise.
002 Internal circuit fault
Common
101
PLC READY OFF during
operation
■ Description
A PLC READY signal (Y0) is 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 2). (Note that the
deceleration stop only occurs during the manual
pulse generator operation.)
■
Action
Review the program which turns ON/OFF PLC
READY signal (Y0).
102 Drive unit READY OFF
■
Description
The drive unit READY signal is turned OFF during
operation.
■ Operation status at error occurrence
The system stops immediately.
■ Action
Check the power supply status of the drive unit,
wiring to the drive unit, and the connection status
of the connector.
■
Description
The start of an operation is requested when the
drive unit READY signal is OFF.
■ Operation status at error occurrence
The system does not start.
■
Action
• Check the power supply status of the drive unit,
wiring to the drive unit, and the connection
status of the connector.
• Check the values in [Pr.22] Input signal logic
selection.
• When a drive unit without READY signal output
is used, wire the system so that the drive unit
READY signal input of the LD75 is always ON.
103
Test mode faults during
operation
■
Description
The personal computer cannot communicate with
the CPU module.
■ 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 2). (Note that the
deceleration stop only occurs during the manual
pulse generator operation.)
■
Action
• Check that there is no error on the personal
computer side I/F to which a cable is
connected.
• Because communication takes a long time
between the personal computer and a CPU
module, ensure high-speed communication by
setting the transmission speed to high at the
transfer setup of GX Configurator-QP or GX
Works2, or connecting the personal computer
directly to the communication I/F of the CPU
module.
• Reduce the load of communication by stopping
the access to a CPU module from GX
Developer or GX Works2 (such as monitor
function).