Beckhoff EL34 Series Documentation page 59

LED Color Meaning
RUN green This LED indicates the terminal's operating state:
off
flashing
rapidly
flashing
Single flash
on
System OK green on
L1 - L3 green on
OK
flashes
off
L1 - L3 red on
Error
I - I green on
L1 L3
OK
flashes
off
I - I red on
L1 L3
Error
EL34xx
State of the EtherCAT State Machine [} 35]:
INIT = initialization of the terminal
State of the EtherCAT State Machine [} 35]:
BOOTSTRAP = function for terminal firmware updates [} 278]
State of the EtherCAT State Machine [} 35]:
PREOP = function for mailbox communication and different default
settings set
State of the EtherCAT State Machine [} 35]:
SAFEOP = verification of the Sync Manager [} 113] channels and the
distributed clocks.
Outputs remain in safe state.
State of the EtherCAT State Machine [} 35]:
OP = normal operating state; mailbox and process data
communication is possible
System OK,
Right prism:
Voltage in normal range
L1 L2
Right prism:
Voltage in the critical range
(warning threshold exceeded)
L1 L2
Right prism:
Voltage in prohibited range
(error threshold exceeded)
L1 L2
Left prism:
Current in normal range
I I I
L1 L2 L3
Left prism:
Current in the critical range
(warning threshold exceeded)
I I I
L1 L2 L3
Left prism:
Current in prohibited range
(error threshold exceeded
I I I
L1 L2 L3
Version: 1.5
Mounting and wiring
L3
L3
L3
I
N
I
N
I
N
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