3.1.2
LEDs of the Head Station
Description of the Modules
20
MITSUBISHI ELECTRIC
RUN
M 1
ERR.
M 0
REL.
DIA
SYN.
BF
FRE.
LED
LED
status
Meaning
RUN
ON
Normally operating
Flickering
쎲
Self-diagnostics are being executed
쎲
Forced output test mode is being executed
OFF
쎲
The external power is off.
쎲
A watchdog timer error has been occured.
ERR.
ON
A error occured in the head station or in a slice module.
Flickering
쎲
Communication error
쎲
The station number has been changed after the head station was powered on.
OFF
Normally operating (no error)
REL.
ON
During online module change the settings of the selected slice module were saved and the
module can now be remounted.
Flickering
After changing a slice module the settings are loaded to the new module.
OFF
Online module change has been completed or is not selected.
DIA
ON
Extended diagnostic information being sent to master station
Flickering
Self-diagnostics of head module being executed.
OFF
No extended diagnostic information.
BF
ON
PROFIBUS/DP data communication is stopped.
OFF
PROFIBUS/DP data communication normal
M1
—
The LEDs M0 and M1 indicate the maximum input/output points setting status of the head
module:
M0
SYN.
ON
SYNC mode is activated.
OFF
Normally operating
FRE.
ON
FREEZE mode is activated.
OFF
Normally operating
Maximum I/O
points
LED status
M1
M0
32
OFF
OFF
64
OFF
ON
128
ON
OFF
256
ON
ON