Table 193: States of the 8 State LEDs (4 per channel) of the Serial Interfaces
LED Color OFF ON Flashing
COMx TxD Yellow No data trans-
mission over
serial network
-- Channel is trans-
mitting data via
the serial inter-
face (flashing
rate depending
on the telegram
transmission fre-
quency)
COMx RxD Yellow No data recep-
tion from serial
network
-- Channel is
receiving data
from the serial
interface
(flashing rate
depending on the
telegram recep-
tion frequency)
COMx STA Yellow RS-232: RTS
signal not active
RS-485: Channel
is in reception
mode
RS-422:Channel
is not enabled
RS-232: RTS
signal is active
RS-485: Channel
is transmitting
RS-422: Channel
is enabled (able
to receive and
transmit)
--
COMx-ERR Red Channel enabled,
no error
or
Channel deacti-
vated
Channel boot up Channel error
(receive buffer
overflow)
Communication Interface Modules (S500) > PROFINET
2019/04/17 3ADR010121, 13, en_US 1099
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