Bosch Rexroth Marex SB Manual page 36

6 Error analysis
6.1 Errors at the control station
Two errors at the control stations must be distinguished:
Alarm During an alarm, the setting of the cruising
functions (speed or gearing) is disturbed. On
the active control head, the red alarm lamp will
be on and a buzzer will sound. The buzzer
signal can be acknowledged and thus switched
off by pushing the key.
The command lamps indicate if the control
head is active or passive, i. e. if this station can
set commands or not.
Special case:
If the active control head is defective, the
passive heads will activate their buzzer and will
go over into the condition "request station".
Warning In case of a warning, the setting of the cruising
function is not disturbed directly. The red alarm
lamp will be active, but the buzzer will not
sound.
For twin engines, the alarm and command lamp are assigned to the respective engine side so that
several lamp reactions as described above may combine. The buzzer will be activated as soon as an
alarm is signaled on one of the engine sides.
Example twin engine
Port The starboard system is error-free and the
Alarm control head is active. The port system is in
Starboard alarm condition, no active command exists on
No Error this control station. Cruising commands can no
longer be set from this station.
In case of an alarm, the alarm relay is activated. In addition, idle speed is set and the gears are
disengaged if the remaining function of the system permit it.
33
active station
passive station
special case:
passive station
Command lamp flashes
active station
passive station
COMMAND
ALARM
SYNCHRO
COMMAND
ALARM
SYNCHRO
COMMAND
ALARM
SYNCHRO
COMMAND
ALARM
SYNCHRO
COMMAND
ALARM
SYNCHRO
COMMAND
ALARM
SYNCHRO