Siemens 6RA7013-6DV62, Operating Instructions Manual

Page: 370 / 734

Function descriptions 05.05
9-14
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
9.4.5 Ramp-up integrator
The ramp-up integrator is activated by setting P302 = 1, 2 or 3. After an "ON" command ("Switch-on",
"Inching", "Crawling"), ramp-function generator setting 1 (P303 to P306) is applied until the ramp-
function generator output reaches the required setpoint for the first time.
The remaining sequence of operations is controlled by the "Enable switchover of ramp-up integrator"
function (binector selected in P646).
Enable switchover of ramp-up integrator = 1:
As soon as the ramp-function generator output reaches the required setpoint for the first time
after the "ON" command, the ramp generator setting selected in P302 is activated automatically.
Enable switchover of ramp-up integrator = 0:
Ramp-function generator setting 1 (P303 to P306) remains active after the generator output has
reached its setpoint until the "Enable switchover of ramp-up integrator" function is switched to 1.
The ramp-function generator setting selected in P302 is then activated.
When the enable signal for ramp-up integrator switchover is cancelled (
→
0), ramp-function generator
setting 1 is activated again and, with a new enable command (
→
1), this setting continues to remain
active until the generator output has reached its setpoint again. The ramp generator setting selected in
P302 is then activated again.
When a "Shutdown" command is given, the drive is shut down according to setting 1.
Note:
Activation of "Ramp-function generator setting 2" (P307 to P310, selected in P637), or "Ramp-function
generator setting 3" (P311 to P314, selected in P368), has priority over the generator setting selected
by means of the "Ramp-up integrator" function.
9.4.6 Ramp-function generator tracking
The ramp-function generator output (K0190) is limited to the following values when ramp-function
generator tracking is activated:
act
p
it lim
act
p
it lim
n
K
25 . 1 M
output RFG n
K
25 . 1 M
+
∗ +
< < +
∗ −
When P170 = 1 (torque control), the following equation applies:
act
p
motor it lim , A
act
p
motor it lim , A
n
K
25 . 1 I
output RFG n
K
25 . 1 I
+
∗ Φ ∗ +
< < +
∗ Φ ∗ −
When P170 = 0 (current control), the following equation applies:
act
p
it lim , A
act
p
it lim , A
n
K
25 . 1 I
output RFG n
K
25 . 1 I
+
∗ +
< < +
∗ −
Φ
motor
Normalized motor flux (1 at rated field current)
n
act
Actual speed value (K0167)
+ M
limit
Lowest positive torque limit (K0143)
– M
limit
Lower negative torque limit (K0144)
+ I
A, limit
Lowest positive current limit (K0131)
– I
A, limit
Lowest negative current limit (K0132)
K
p
Effective speed controller gain
However, if the value added to n
act
were to correspond to less than 1%, then +1% or –1% would be
added.
The purpose of the "Ramp-function generator tracking" function is to ensure that the ramp generator
value cannot deviate excessively from the actual speed value once the torque or current limit has
been reached.
Note:
When ramp-function generator tracking is selected, the filter time for the speed setpoint should be set
to a low value in P228 (preferably to 0).