Siemens 6RA7086-6KS22 Operating Instructions Manual page 499

05.05
PNU Description
P179 Additional Alpha W pulses with enabled second pulses
FDS
Number of additional Alpha W pulses with enabled second pulses after
(G163) detection of I=0 message prior to a change in torque direction.
It is particularly important to set this parameter to values of > 0 for converter
armatures which supply large inductances (e.g. lifting solenoids).
These pulses cause the current to decay before a change in torque
direction; the thyristors are fired in pairs to prevent sudden chopping, and
the generation of a surge voltage by the load inductor, when the current
drops below the thyristor holding current.
When a change in torque direction is required, the current in the existing
direction must be reduced.
This is achieved in the following ways:
If P179 > 0:
1) Alpha W pulses with enabled second pulses
until the I=0 signal arrives
2) Additional Alpha W pulses with enabled second pulses
(number as set in P179.F)
3) Additional Alpha W pulses with disabled second pulses
(number as set in P161.F)
4) Additional torque-free interval (period as set in P160.F)
If P179 = 0:
1) Alpha W pulses with disabled second pulses
until the I=0 signal arrives
2) Additional Alpha W pulses with disabled second pulses
(number as set in P161.F)
3) Additional torque-free interval (period as set in P160.F)
P180 Positive torque limit 1
FDS
(G160)
P181 Negative torque limit 1
FDS
(G160)
P182 Positive torque limit 2
If "Torque limit switchover" is selected (state of binector selected in P694
FDS
=1) and the speed is higher than the threshold speed set in parameter
(G160) P184, then torque limit 2 is activated in place of torque limit 1.
P183 Negative torque limit 2
If "Torque limit switchover" is selected (state of binector selected in P694
FDS
=1) and the speed is higher than the threshold speed set in parameter
(G160) P184, then torque limit 2 is activated in place of torque limit 1.
P184 Threshold speed for torque limits
If "Torque limit switchover" is selected (state of binector selected in P694
FDS
=1) and the speed (K0166) is higher than the threshold speed set in
(G160) parameter P184, then torque limit 2 (P182, P183) is activated in place of
torque limit 1 (P180, P181).
P190 Filter time for setpoint for armature current precontrol
FDS
Filtering of the armature current setpoint at the input of the precontrol for the
(G162) armature current controller.
The purpose of this filter is to decouple the armature current precontrol from
the armature current controller.
P191 Filter time for setpoint for armature current controller
FDS
Filtering of the armature current setpoint at the input of the armature current
(G162) controller.
The purpose of this filter is to decouple the armature current precontrol from
the armature current controller.
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
Value range
[Unit]
Steps
0 to 100
1
[SW 1.9 and later]
-300.00 to 300.00
[%]
0.01%
of rated motor torque
-300.00 to 300.00
[%]
0.01%
of rated motor torque
-300.00 to 300.00
[%]
0.01%
of rated motor torque
-300.00 to 300.00
[%]
0.01%
of rated motor torque
0.00 to 120.00
[%]
0.01%
of maximum speed
0 to 10000
[SW 1.9 and later] [ms]
1ms
0 to 10000
[SW 1.9 and later] [ms]
1ms
Parameter list
No. indices See
Factory Change
setting (Access /
Type Status)
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
Ind: 4 P052 = 3
FS=300.00 P051 = 40
Type: I2 Online
Ind: 4 P052 = 3
FS=-300.00 P051 = 40
Type: I2 Online
Ind: 4 P052 = 3
FS=300.00 P051 = 40
Type: I2 Online
Ind: 4 P052 = 3
FS=-300.00 P051 = 40
Type: I2 Online
Ind: 4 P052 = 3
FS=0.00 P051 = 40
Type: O2 Online
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
Ind: 4 P052 = 3
FS=0 P051 = 40
Type: O2 on-line
11-35