Siemens SIMATIC NET PROFIBUS - Manual (Page 382)

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.
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.
lit orange Data being sent, acknowledgment bit activated but not correctly
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)
lit red Data optically received, the level is however low (RX LED also lit)
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