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7. Connection Procedure
24
■
LED indicators on the Sensor Communication Unit
Color
Status
Description
Color
Status
Description
Color
Status
Description
[PWR] indicator
[L/A IN] indicator
[L/A OUT] indicator
-
Not lit
Unit power OFF state
-
Not lit
Link not established in
physical layer
-
Not lit
Link not established in
physical layer
Gree
n
Lit
The unit power (24 VDC)
is supplied to the Slave
Unit.
Flashing
In operation after
establishing link
Flashing
In operation after
establishing link
[ERR] indicator
Gree
n
Lit
Link established in physical
layer
Gree
n
Lit
Link established in physical
layer
-
Not lit
No error
[RUN] indicator
[SS] indicator
Blinking
Communications Setting
Error
- Not
lit
Link not established in
physical layer
-
Not lit
Power OFF or power
supply ON is being initial
confirmed.
Single flash
Communications data
error
Blinking Pre-Operational
state
Gree
n
Lit
Normal: The number of
connected Sensors agrees
with the setting.
Double
flash
Application WDT timeout
Single flash Safe-Operational state
Red
Lit
Sensor Error: The number
of connected Sensors is
different from the setting.
Flashing Boot
error
Gree
n
Lit Operational
state
Red
Lit
PDI WDT timeout
Summary of Contents for Sysmac NJ-series
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