Configuration
7-60
48XX/49XXSHB0399
7.4.3 4Q / 2Q changeover
Purpose
Withachangeto2Q,thearmaturevoltage V
A
can be set to 1.15 ¼ V
rated
instead of
1.05 ¼ V
rated
in 4Q operation.The direction of rotation cannot be changed through
thecontroller (if necessary, consider the changeof the directionof rotationthrough
active loads).
The changeover is carried out through code C180 of the extended code set when
the controller is inhibited.
With the changeover:
( all set-value paths remain the same.
( the current limit C023 is internally set to 0. It is still possible to enter external
values.
( only bridge 1 is active (motor terminal A is positive).
( the deceleration ramp C105 remains effective at QSP. However, no energy
is fed back to the mains, i.e. the motor is coasting to standstill if the
deceleration times are very short.
Stop!
With 48XX controller, the mode 4Q must not be selected. If the controllers
4808...4813 are set to 4Q operation, the fuses may blow.
4900Str047
-
+
C 022
C 023 = 0
n
set
n
act
n-controller
I
max
FIG 7-20 Signal-flow chart (section) for 2Q operation
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