ABB DCS800 Guide Rapide page 12

START, STOP and E-STOP control
The relay logic can be split into three parts:
a: Generation of the ON/OFF and START/STOP com-
mand:
The commands represented by K0 and K1 (latching inter-
face relay) can be e.g. generated by a PLC and transferred to
the terminals of the converter either by relays, using galvanic
isolation or directly via 4V signals.
These commands can be as well transferred via serial
communication. Even a mixed solution can be realized by
selecting different possibilities for the one or the other signal
(see parameter group 11).
PC tool or panel
ON
RUN
MCW (7.01)
RESET
ON
RUN
RESET
HW I/O
ON
RUN
RESET
command
location (10.01)
b: Generation of control and monitoring signals:
The main contactor K1 for the armature circuit is controlled
by a dry contact (DO 8) located on the SDCS-PIN-4. Status
of fans and fans klixon can be monitored by means of fan
ack signals: MotFanAck (10.06) and ConvFanAck (10.0).
c: OFF, OFF3 Stop function:
Beside ON/OFF and START/STOP, the drive is equipped
with two additional stop functions, OFF and OFF3, accor-
ding to Profibus standard. OFF3 is a scalable stop function
(rampstop, max torque stop, dynamic braking ...) to perform
stop category 1. This function should be connected to the
E-STOP button without any time delay. In case of ramp stop
selection the, K 15 timer relay must be set longer than the
EStopRamp (.04). For COAST selection, the drive opens
the main contactor immediately.
OFF switches off DC current as fast as possible and pre-
pares the drive for opening main contactor or drop down
mains supply. For a normal DC motor load the time to switch
OFF the DC current is below 0 ms. This function should be
connected to all signals and safety functions opening the main
contactor. This function is important for 4-quadrant drives.
Do not open main contactor during regenerative current.
The correct sequence is
1. switch off regenerative current
. then open the main contactor
In case of the E-STOP is hit, the information is transferred
to the converter via digital input 5. In case of rampstop, or
max torque selection the converter will decelerate the motor
and then open main contactor.
1
3ADW000191R0500 DCS800 Quick guide edisf e
USED MCW
7.04
used
Main Control Word
local /
remote
gen_ctrl_cmd_a.dsf
If the drive has not finished the function within the K15 timer
setting, the drive must get the command to switch OFF the
current via K16. After K16 timer set has elapsed the main
contactor is opened independent of the drives status.
K16
EMER.
STOP
Anschl_special_a.dsf
E-Stop ramp
E-Stop reaction
ELEC.
DISCONN.
1
K15
S1
2
K15 K16
CON-4
DI4 X6:9
Block
current
K15
command
E-STOP
speed
Timer K15
Timer K16
Block current control
K1 main contactor
Coast
Stop-Mode_a.dsf