Mitsubishi MELSEC-WS series, User Manual

Page: 32 / 152

Chapter 3
29
Product description
MS LED Meaning Notes

Supply voltage is outside
range Switch on the supply voltage and check
it at the terminals A1 and A2.
Red/Green (1 Hz) A self test is being carried
out or the system is being
initialized
Please wait …
Green (1 Hz) System is in Stop state Start the application in the Setting and
Monitoring Tool.
Green (2 Hz) Identify (e.g. for Flexi Link) –
 Green System is in Run state –
Red (1 Hz) Invalid configuration Check the module type and version of
the CPU module and safety I/O
modules whose MS LED flashes
Red/green.
If appropriate, adapt the configuration
using the Setting and Monitoring Tool.
For detailed information refer to the
Setting and Monitoring Tool,
Diagnostics view.
Red (2 Hz) Critical error in the system,
possibly in this module.
Application is stopped. All
outputs are switched off. Switch the supply voltage off and on
again. If the error is not eliminated after
multiple repetition, replace this module.
For detailed diagnostics information
refer to the Setting and Monitoring Tool.
 Red Critical error in the system,
possibly in another module.
Application is stopped. All
outputs are switched off. Switch the supply voltage off and on
again.
If the error is not eliminated after
multiple repetition, replace the module
which displays Red (2 Hz). If this is
not the case, use the diagnostic
functions of the Setting and Monitoring
Tool to narrow down the respective
module.
CV LED Meaning Note

Configuration in progress –
Yellow (2 Hz) Storing of configuration
data in the non-volatile
memory Supply voltage may not be interrupted
until the storage process has been
completed.
Yellow (1 Hz) Unverified configuration Verify configuration with the Setting and
Monitoring Tool.

Yellow Verified configuration –
Pin Assignment
A1 24 V voltage supply for all the modules, with the exception of the outputs
(Q1…Q4)
A2 GND of the voltage supply
Table 6:
Displays of the MS LED
on
WS0-CPU0
Table 7:
Displays of the CV LED
on
WS0-CPU0
Table 8:
Memory plug pin
assignment