Watson-Marlow MM440 - Manual (Page 219)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0 219
NOTE
¾
When the minimum DC link voltage V
DC_min
is fallen below, fault F0003
"Undervoltage" is output and the drive inverter is shut down. The shutdown
threshold V
DC_min
depends on the drive inverter type / line supply voltage.
Table 3-34 DC link undervoltage – shutdown threshold
Drive inverter type / line supply voltage Shutdown threshold V
DC_min
1-ph. 200 V – 240 V AC ± 10 % 215 V
3-ph. 200 V – 240 V AC ± 10 % 215 V
3-ph. 380 V – 480 V AC ± 10 % 430 V
3-ph. 500 V – 600 V AC ± 10 % 530 V
3.19 Positioning down ramp
Parameter range: P0500
P2480 – r2489
Warnings -
Faults -
Function chart number:
-
The positioning down ramp (enabled using P0500) can be used for applications
where it is necessary that a residual distance is moved-through up to the stop
dependent on an external event (e.g. BERO switch). In this case, MICROMASTER
440 generates a continuous braking ramp by selecting OFF1 depending on the
actual load speed / velocity. The drive is then stopped/positioned along this braking
ramp (refer to Fig. 3-85).
Motor Gear
f
⋅ = =
2
1
P2488 s
t
OFF1
f
OFF1
. t
P2488
.
t
P2488
f
OFF1
Fig. 3-85 Positioning down ramp
In this case, the remaining distance P2488 moved through must be entered,
referred to the load. In order to carry-out the residual distance calculation on the
load side, the mechanical arrangement of the axis (gearbox ratio, linear or rotary
axis) must be appropriately parameterized (refer to Fig. 3-86).