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2 Nomenclature and Installation
CJ-series EtherCAT Slave Units Operation Manual (W541)
2-1 Nomenclature
2
2-1-2 Indicators
An EtherCAT Slave Unit is equipped with the following indicators that provide the operating status of
the Unit itself and the overall network.
Overview of Indicators
Indicator Details
2-1-2 Indicators
Name Meaning
L/A IN The L/A IN indicator shows the link activity of the input port.
L/A OUT The L/A OUT indicator shows the link activity of the output port.
ECAT RUN The ECAT RUN indicator shows the operating status of EtherCAT communications for the
EtherCAT Slave Unit.
ECAT ERR The ECAT ERR indicator provides information on errors in the EtherCAT Slave Unit.
RUN The RUN indicator provides information on the operation of the EtherCAT Slave Unit.
ERC The ERC indicator provides information about errors of the EtherCAT Slave Unit.
ERH The ERH indicator provides information about errors of the CPU Unit.
Name Color Status Meaning
L/A IN
L/A OUT
Green Lit Link established in physical layer
Flickering Operating after establishing link
Not lit Link not established in physical layer
ECAT RUN Green Lit Operational state
Blinking Pre-Operational state
Single flash Safe-Operational state
Flickering Initializing process
Not lit Init state
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