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49
Operating manual ZX09/20/21-Series
The following tables list the possible states of the LEDs and their meaning for the
control variants with PROFINET interface (ZX20TP, ZX21TP) or EtherCAT interface
(ZX20TC, ZX21TC).
ZX20TP, ZX21TP:
LED
Color
Status
Meaning
SYS
Green
On
Bus module ready for operation
Green/
Yellow
Flashing
Green/Yellow Bus module moves up
Yellow On
-
Off
Device is switched off or bus module is defective
BF
Red
On
No configuration; no/bad connection
Red
Flashing
cyclically
with 2 Hz
No data exchange
-
Off
No error
SF
Red
On
Watchdog time-out; system error
Red
Flashing
cyclically
with 2 Hz
DCP signal service is triggered via the bus
-
Off
No error
Link
Ch0
Ch1
Green
On
There is a connection to the Ethernet
-
Off
There is no connection to the Ethernet
RX/TX
Ch0
Ch1
Yellow Flashing
Data is sent/received