Moeller Rapid Link, Switching And Installation System, Page: 60 / 162

Motor starter RA-MO
(to Version 2.x)
01/08 AWB2190-1430GB
56
I/O fault messages, internal device faults
The RA-MO generates an I/O error message (FID), when
• the AS-Interface
®
voltage is applied but the 24 V is not. A
subsequent failure of the 24 V supply does not cause an I/O
error, so that this fault can occur only during commissioning.
• motor current is flowing even though the contactor is not
energized (internal device fault, from RA-MO version 2.1). This
can be caused by welded contactors. Replace the DILEM4-G
(24 V DC) in that case.
I/O errors are indicated on the RA-MO and on the interface control
unit RA-IN by a flashing LED AS-Interface
®
Error. The PLC
contains a list of slaves with I/O errors (LPF).
In the event of an internal device fault, the motor and FWD/REV
LEDs also flash. In addition, on devices from version 2.1 with
information number 3.6.4c (
a table 3 on page 61), diagnostics
status scanning must be activated through the AS-Interface
®
parameter channel.
Intrernal device faults can be uniquely identified with a RA-MO
diagnostic status request (
a table 2 on page 60) with the
command WRITE P = 111. If an internal device fault occurs, the
400 V supply of the affected busbar run must be switched off. A
reset can be carried out by switching off the 24 V DC supply. From
version 2.2 a Reset can be performed with the key-switch or
through AS-Interface
®
.
Auto configuration for servicing
When you replace a RA-MO with an identical device, the AS-
Interface
® is
automatically transferred.
Requirement:
• Auto-addressing mode is enabled (default setting for RA-IN).
• The 400 V
~
/24 V supply and AS-Interface
®
are active.
Procedure:
X
Connect the new motor starter with the key-switch in the OFF
position.
After no more than 0.5 seconds all error LEDs must have gone out.
X
Select manual or auto operating mode.
Key-switches
The key-switches engage in all positions.
Reset
As soon as LED Motor has changed from continuously lit to
flashing, triggering of the motor preotection function or thermistor
protection can be manually reset with switching sequence AUTO
r OFF or MANUAL r OFF. To perform a Reset, hold the key-
switch in the OFF position for about half a second.
From version 2.x: The Reset signal through AS-i provides an
additional possibility for a motor starter reset in case the motor
starter is not accessible for a local reset. The local reset with the
key-switch remains the main reset function, since it is necessary
for analysing and eliminating fault causes locally.
In automatic operation the RA-MO interprets simultaneous setting
of the forward and reverse operation outputs (data bits DO0 and
DO1) as a Reset. Before a reset, data bits DO0 and DO1 must be
Low for at least 18.5 ms. The reset is performed when the data bits
are then High for at least 18.5 ms.
A built-in logic circuit and a mechanical interlock prevent fault
conditions.
On a motor overload a reset is possible only when the motor is
ready for operation again due to the thermal memory or the
thermistor resistance.
After failure of the 24 V DC supply, a manual acknowledge is not
required when power is restored. The error signal from each RA-
MO to the PLC caused by the 24 V DC supply failure is reset
automatically.
Selector switch
The key-switches engage in all positions.
j Danger!
Conversion must be performed only by trained
electricians. Incorrect work causes a risk of death through
electric shock.
Switch
postion AUTO 0FF
RESET
Hand
Key
withdraw
able yes yes No
Function Operation
through AS-
Interface
®
,
Status signal to
PLC
Reset motor
protection, no
contactor
actuation,
secured against
restarting. Contactors can
be actuated
manually
through the
selector switch.
Switch postion REV OFF FWD
Function (with
key-switch in
MANUAL position
only) Reversing
contactor
actuated (DOL
starter has no
actuation) No actuation
of contactors Main
contactor
actuated