Siemens SIMATIC NET PROFIBUS Owner's Manual page 384

Infrared Link Modul (ILM)
LED Display
POWER LED lit green
TX LED lit orange,
RX LED lit yellow
POWER LED lit green
TX LED lit orange,
RX LED lit yellow,
LOW LED lit red
POWER LED lit green
TX LED lit yellow
RX LED not lit
POWER LED lit green
TX LED lit yellow,
RX LED lit yellow,
LOW LED lit red
POWER LED lit green
TX and RX LEDs not lit
ERROR LED lit red
POWER LED lit green
RX LED lit yellow
ERROR LED lit red
Table 1: Possible problems operating the PROFIBUS ILM
Copyright by Siemens
Possible Causes
- No acknowledgment pulse received since partner
station not configured with acknowledgment pulse
- On point-to-multipoint links on the PROFIBUS
ILM of the master subnet if acknowledgment bit
configured (see Section 6.4)
- No acknowledgment pulse received since partner
station is not configured with acknowledgment
pulse or receive level for acknowledgment pulse
and response frame too low.
- On a point-to-multipoint link on the PROFIBUS
ILM on a slave subnet if configured with acknow-
ledgment bit (see Section 6.4)
- Partner station not responding because not atta-
ched, infrared link interrupted, incorrectly configu-
red (PROFIBUS address of the slave incorrect,
data rate of the partner PROFIBUS ILM set incor-
rectly etc.)
- Risk of problems on bus, since infrared link has
too much attenuation (obstacles in area of trans-
mission link, distance between PROFIBUS ILMs
too great, PROFIBUS ILM turned out of line with
partner station)
- Risk of problems on bus due to incidence of ex-
traneous light (for example sunlight, lamps with
infrared component, halogen lamps with high
energy)
- Bus problems must be expected due to incidence
of extraneous light with high-frequency modula-
tion (for example energy-saving lamps with HF
switching device)
42
6ZB530–3AC30–0BA1
Signaling
Contact
Signals when
configured
(acknowledg-
ment pulse)
Signals if
configured
(acknowledg-
ment pulse,
level monito-
ring)
Signals when
configured
(bus activity)
Signals when
configured
(level monito-
ring)
Signals when
configured
(constant
light)
Signals when
configured
(constant
light)