3 609 929 B46/2008-09 | LT353/LT354/LT355
Bosch Rexroth AG
21
ENGLISH
ENGLISH
ITALIANO
ESPAÑOL
PORTUGUÊS
SVENSKA
FRANÇAIS
Displays and operating elements
The front panel of the servo amplifier contains
two LEDs to display the operating state and
the reset button for resetting the tightening
channel after a fault.
BTB LED function.
This LED primarily
serves to signal faults. There are 4 states of
the BTB LED:
• LED with steady green light: No fault, LT
ready for operation
• LED flashing green: No fault, LT not ready
for operation, interruption of NH signal
(emergency OFF)
• LED with steady red light: Fault, LT not
ready for operation
• LED with steady orange light (red and
green steady light alternately): Abort
tightening and switch off the LT (sleep
mode) as VM350 power supply module is
not ready for operation.
• LED flashing red/green alternately: LT not
yet logged in to SE controller.
During tightening:
If the emergency OFF
signal is interrupted during tightening, e.g.
due to EMERGENCY OFF, tightening is
actively braked and tightening is aborted with
an error message output to the SE. The BTB
LED has a steady red light. The fault can be
reset in the LT as soon as the emergency
OFF signal is received again and the
contactor has tightened. The BTB LED then
has a steady green light again. A new
tightening can be started only after
acknowledgement via the operating program.
Table 1
LED/but-
ton
Display Diagnosis
BTB
Off
No power supply or LT is in
download mode
Green
Ready for operation
Green,
flashing
Not ready for operation, but
no system error; emergency
OFF has been triggered
Red
System error
Orange
VM power supply module not
ready
FG
Off
No servo amplifier release
Green
Servo amplifier release
Reset
When pressed, a reset is performed to
reinitialise the tightening channel
LT35x.book Seite 21 Montag, 22. September 2008 8:55 08
