Siemens SIMATIC NET PROFIBUS User Manual
Infrared Link Modul (ILM)
6ZB530–3AC30–0BA1
40
Copyright
by Siemens
9
Displays
POWER
green LED
not lit
No power supply or internal power supply defective or ribbon ca-
ble not plugged in.
ble not plugged in.
lit green
Power supply OK
TX
yellow/orange LED
not lit
Data not sent optically
lit yellow
Data are sent, acknowledgment bit correctly received or acknow-
ledgment bit mechanism not activated.
ledgment bit mechanism not activated.
lit orange
Data being sent, acknowledgment bit activated but not correctly
received.
received.
RX
yellow LED
not lit
Data not optically received
lit yellow
Data optically received
LOW
red LED
not lit
Receive level OK (RX LED lit)
no receive level (RX LED also not lit)
no receive level (RX LED also not lit)
lit red
Data optically received, the level is however low (RX LED also lit)
risk of data errors
risk of data errors
ERROR
red LED
not lit
Infrared level at receiver is not critical
lit red
Infrared level at receiver is critical, risk of data errors