Service
210 SICAM RTUs, SICAM AK 3 User Manual
Edition 07.2016, DC2-028-2.03
Display elements of the protocol element equipped with submodule SM-2558 without
SM-0551
Name Color Function LED Meaning
OH X2 yellow - - -
RTX X2 yellow - - -
ACT2 yellow - - -
ER2 yellow - - -
OH X3 yellow
PRE3 Link
˜
Protocol element 3, physical connection to
switch/remote station
RTX X3 yellow
PRE3 Packet
˜
Protocol element 3, activity on trans-
mit/receive direction
ACT3 yellow
PRE3 Active
˜
Protocol element 3, interface active - redun-
dancy
ER3 yellow
PRE3 Error
˜
Protocol element 3, Error on interface
Display elements of the protocol elements equipped with submodule SM-2558 with
SM-0551
Name Color Function LED Meaning
OH X2 yellow
PRE2 request to
send
˜
Protocol element 2, Send request to transmis-
sion facility
RTX X2 yellow
PRE2 Receive
˜
Protocol element 2, activity on trans-
mit/receive direction
ACT2 yellow
PRE2 Active
˜
Protocol element 2, interface active - redun-
dancy
ER2 yellow
PRE2 Error
˜
§
Protocol element 2, Error on interface
Communication failure (all connections faulty)
Communication fault (at least one connection
faulty)
OH X3 yellow
PRE3 Link
˜
Protocol element 3, message is sent to
switch/remote station
RTX X3 yellow
PRE3 Packet
˜
Protocol element 3, activity on trans-
mit/receive direction
ACT3 yellow
PRE3 Active
˜
Protocol element 3, interface active - redun-
dancy
ER3 yellow
PRE3 Error
˜
Protocol element 3, Error on interface
Display elements of the protocol elements equipped with submodule SM-2551
Name Color Function LED Meaning
OH X2 yellow
PRE2 request to
send
˜
Protocol element 2, Send request to transmis-
sion facility
RTX X2 yellow
PRE2 TXD/RXD
˜
Protocol element 2, activity on trans-
mit/receive direction
ACT2 yellow
PRE2 Active
˜
Protocol element 2, interface active - redun-
dancy
ER2 yellow
PRE2 Error
˜
§
Protocol element 2, Error on interface
Communication failure (all connections faulty)
Communication fault (at least one connection
faulty)