6 Status messages
6.3 Resetting after an error message
EMS2… Electronic motor starter
10/19 MN034003EN
www.eaton.com
43
6.3.2 Manual reset
After remedying the error, the error message can be reset manually. In the
case of a message from the motor protection, note that the error message
can be reset only after the cooling-down time has passed. The
L
,
R
or
ON
LED lights up permanently during the cooling-down time.
After the cooling-down time, the permanent light changes to flashing, mean-
ing a reset is now possible.
For a reset, the EMS2 motor starter requires a signal with a rising edge on
the MAN terminal with a duration of less than 2 seconds.
•
If the signal is longer or the reset button on the front of the device is
pressed for longer, the device remains in error mode and the set motor
current is displayed.
•
If the signal lasts for longer than 6 seconds, the device switches to pro-
gramming mode (
section 4.2.4, “Setting of the motor protection”).
Figure 24: Circuit for a manual reset
left: via external button; right: via PLC
If the message is to be reset by an external button, this must be connected
between the RES and MAN terminals.
Only for devices with a control voltage U
S
of 24
V
DC
A reset can also be carried out with a 24-V signal from an external PLC.
To do so, the output of the PLC needs to be connected to the MAN terminal.
The reference point for the PLC output voltage must be connected with
terminal A2.
￫
Automatic reset of the EMS2 electronic motor starter is
not
permitted in potentially explosive Ex e increased safety areas.
WARNING
It is not possible to perform a reset via a PLC for devices with a
control voltage of 230 V AC.
In this case, connecting the PLC to terminal A2 could destroy
the PLC.
￫
The error is not reset when the reset signal is applied; it is reset
when it is withdrawn (falling edge).
MAN RES
EMS2
AUT A2
RESET
MAN RES
EMS2
nur/only EMS2…24 V DC
AUT A2
OUT
PLC/SPS
GND
