ABB 3BSE013177R1 LDGRB-01 Controller
Start, Stop and E-Stop control
The relay logic is splitted into four parts:
1: Generation of the On / Off and Start / Stop commands:
The commands represented by K20 and K21 (latching interface relays) 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):
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 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.
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.

4: DC contactor (US style):
The DC contactor (US style) K1.1 is a special designed DC contactor with one normally closed contact for the
dynamic braking resistor RB and two normally open contacts for C1 and D1. The DC contactor should be
controlled by 06.24.b10 Current controller status word 1. The acknowledge signal can be connected to either
20.34 Mains contactor acknowledge source, or 20.35 DC breaker acknowledge source. Use 20.33 Mains
contactor control mode = DC contactor.
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)
Emergency stop reaction
U1 W1 V1 PE
F100 - F102
C 1 D 1
M
+ _
L1
X10: F+ FOnBoard field exciter
K1.1 RB
SF_800_003_us_b.ai
DCS880
Internal voltage
measurement DZ_LIN_007_us_c.ai
Mains contactor 06.24.b07
Dynamic braking contactor 06.24.b08
US style DC contactor 06.24.b10t
Internal DC voltage
measurement
DC voltage measurement
at the motor terminals
Without field
weakening
20.44 Dynamic braking
delay 0.1 s.
20.44 Dynamic braking
delay -0.1 s.
With field
weakening
Not allowed