—
Start, Stop and E-Stop control
The relay logic is splitted into four parts:
1: Generation of the On / Off and Start / Stop command:
The commands represented by K20 and K21 (latching interface
relay) can also be generated by a PLC and transferred to the
terminals of the converter either by relays, using galvanic
isolation or directly via 24 V signals.
There is no need to use hardwired signals. Transfer these
commands via serial communication. Even a mixed solution can
be realized by selecting different possibilities for the one or the
other signal (see parameter groups 06 and 20):
06.01 Main control word
SF_DCS_001_ctrl-cmd_b.ai
06.09 Used main control word
Local I/O
20.01 Command location
PC tool or panel
Local / Remote
On
Run
Reset
On
On
Run
Reset
Reset
Run
PLC
2: Generation of control and monitoring signals:
Control the mains contactor (K1) of the armature circuit by the
relay contact of XSMC. The status of the drive and / or motor
fans (K8) can be monitored by means of 20.38 Drive fan
acknowledge source and 20.39 Motor fan acknowledge source.
3: Off2 (emergency off / electrical disconnect / fast
current off) and Off3 (emergency stop):
Beside
On
/ Off
and
Start / Stop
the drive is equipped with two
additional stop functions
Off2
and
Off3
according to Profibus
standard.
Off3 is scalable via 21.03 Emergency stop mode to perform a
ramp stop according to category 1. Connect this function to the
E-stop push button (off3) without any time delay. In case of
21.03 Emergency stop mode = Ramp stop the timer relay (K15)
must be set longer than 23.23 Emergency stop time. For 21.03
Emergency stop mode = Coast stop the drive opens the mains
contactor immediately.
Off2
switches the DC current off as fast as possible and
prepares the drive to open the mains contactor or drop the
mains supply. For a normal DC motor load the time to force the
DC current to zero is below 20 ms. This function should be
connected to all signals and safety functions opening the mains
contactor. This function is important for 4-Q drives. Do not
open mains contactor during regenerative current. The correct
sequence is:
1. Switch off regenerative current.
2. Then open the mains contactor (K16 timer delay).
In case the E-stop push button is hit, the information is
transferred to a digital input of the converter. In case 21.03
Emercency stop mode = Ramp stop or Torque limit the
converter will decelerate the motor and then open the mains
contactor. If the drive has not finished the function within the
timer relay (K15) setting, the drive must get the command to
switch off the current via timer relay (K16). After the timer relay
(K16) has elapsed, the mains contactor is opened immediately,
independent of the drive's status.
Emergency stop reaction
K16
K15
K15
1
2
SF_CON4_001_E-stop_b.ai
1
2
K16
Off2
Off2
Off2 (current off)
1
DIL
XD24
2
+24 VD
Off3
DZ_LIN_006_E-stop_b.ai
Emergency stop
Speed
Block current control
Mains contactor (K1)
Emergency stop ramp
Coast
Timer relay (K15)
Timer relay (K16)
14
A B B i n dustr i A l dr i v e s
D C S 8 8 0 Q u i C k g u i D e - 3 A D W 0 0 0 4 8 0 R 0 2 01
14
A B B i n dustr i A l dr i v e s
D C S 8 8 0 Q u i C k g u i D e
