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Safety technology: MCB14x Document No.:
MG34Y104
Rev.: 06 23 October 2012 Page 14 of 25
6.1.
Example application
A FC302 with MCB140 and a self-closing door with two safety outputs for position monitoring and an input for
magnet control are used.
During SLS operation, jogging is possible in the event of an open separating protective device.
SS1 is enabled via a separate actuator (e.g. Emergency Stop switch).
Figure 4: Flow chart of example application
Expiry:
1. SS1 is enabled, meaning that the frequency converter reduces the speed until it comes to a standstill
2. In this example, it falls below zero speed before the SS1 timer has elapsed. If it falls below zero speed,
then STO is enabled and the standstill is displayed.
3 Opening the separating protective device leads to STO being enabled. In this example, STO is already
enabled following completion of the SS1 operation.
4. In the event the SS1 operation is disabled, STO, which was tripped by the SS1 operation, is then
cancelled. In this example, STO remains enabled thanks to the open protective device.
5. When enabling SLS, STO is disabled in the event of an open protective device. Depending on the
parameterisation of the frequency converter used, a reset is now required on the frequency converter (in
FC302, for example, if STO is set to Alarm).
6. If SLS is enabled, then it can now be moved in the event of an open separating protective device
(e.g. by using the Jog operation).
If there is movement at velocities faster than the values entered for
SLS, then a fault is tripped and STO is enabled.
The velocity values entered for this jog mode do not come from the MCB14x, but must instead be set in the
frequency converter.
7. If SLS is disabled, then STO is enabled again straight away by the open separating protective device.
8. If the separating protective device is closed, then STO is disabled. Just like in Point 6, the safety operation
shall need to be reset here.
9. If the movement velocity exceeds zero speed, then the separating protective device is interlocked.
1
3
0
B
D
8
5
8
.1
0
1
2
3
4
5
6
6
7
8
9
SLS Speed Limit
Zero Speed
SS1 (8,9)
SLS (10, 11)
Door (12,13)
STO_O (18) + ExC (5)
Ramp (17)
SSO (6)
T37
T18
Jog. T29
Time
Speed
SS1 active
SLS active
STO active
STO active
Braking ramp
Standstill output high
STO active
STO active
Braking ramp
Jogging
Jogging
SS1 with interlocking and jog mode
MCB140 outputs
MCB140 inputs
FC302 inputs
Door open