Siemens 6RA7013-6DV62, Operating Instructions Manual

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05.05 Function descriptions
SIEMENS AG 6RX1700-0AD76
9-77
SIMOREG DC Master Operating Instructions
9.18.2 Braking with field reversal
This function is controlled by the binector selected in P581.
"Braking with field reversal" has a pushbutton function.
If the logic level of the binector controlling the "Braking with field reversal" function = 1 (for at least
30 ms) and the converter is in an operating state
≤
o5 (line contactor closed), an internal process is
activated for braking the drive down to n < n
min
The original field direction is then selected.
The motor cannot accelerate again in the original rotational direction until the braking command has
been cancelled (binector level = 0) and an acknowledgement given with "Shutdown" and "Switch-on".
Sequence of control operations when "Braking with field reversal" is applied:
1. Drive rotates in direction 1
2. The binector controlling the "Braking with field reversal" function = 1 for more than 30 ms
3. Internal field reversal process takes place (only if the line contactor is closed (in operating state
of
≤
o5) and the drive is not already in braking mode. Braking is detected by a negative internal
actual speed (resulting from reversal of the real actual speed polarity in the negative field
direction):
3.1
Wait for armature current I
A
= 0 and then armature pulse disable
(drive then dwells in operating state
≥
o1.4)
3.2 Disable field firing pulses (also causes K0268=0)
3.3 Wait for I
field
(K0265) < I
field min
(P394)
3.4 Waiting time according to P092.i001 (0,0 to 10,0 s, factory setting 3,0 s)
3.5 Open current field contactor (B0260 = 0 or B0261 = 0)
3.6 Waiting time according to P092.i002 (0,0 to 10,0 s, factory setting 0,2 s)
3.7 Close new field contactor (B0261 = 1 or B0260 = 1)
3.8 Reverse polarity of actual speed value (except when P083 = 3 ... EMF as actual speed
value)
3.9 Waiting time according to P092.i003 (0,0 to 10,0 s, factory setting 0,1 s )
3.10 Enable field firing pulses
3.11 Wait for I
field
(K0265) > I
field set
(K0268)*P398/100%
3.12 Waiting time according to P092.i004 (0,0 to 10,0 s, factory setting 3,0 s)
3.13 Enable armature firing pulses (It is possible to exit operating mode o1.4)
4. Internal sequence for braking the drive:
4.1 Internal setting of n
set
= 0 at the ramp function generator input, the drive brakes
4.2 Wait for n < n
min
(P370)
4.3 Wait for armature current I
A
= 0 and thus armature pulse disable
(drive then switches to operating state o7.2)
4.4 Wait for cancellation of braking command through binector level = 0 (as long as
level = 1, drive is held in operating state o7.2)
5. Internal sequence for switching over to original field direction (only if the current field direction is
not the same as the direction requested by the "Direction of rotation reversal using field
reversal" function):
5.1
Wait for armature current I
A
= 0 and then armature pulse disable
(drive then dwells in operating state
≥
o1.4)
5.2 Disable field firing pulses (also causes K0268=0)
5.3 Wait for I
field
(K0265) < I
field min
(P394)
5.4 Waiting time according to P092.i001 (0,0 to 10,0 s, factory setting 3,0 s)
5.5 Open current field contactor (B0260 = 0 or B0261 = 0)
5.6 Waiting time according to P092.i002 (0,0 to 10,0 s, factory setting 0,2 s)
5.7 Close new field contactor (B0261 = 1 or B0260 = 1)
5.8 Reverse polarity of actual speed value (except when P083 = 3 ... EMF as actual speed
value)
5.9 Waiting time according to P092.i003 (0,0 to 10,0 s, factory setting 0,1 s)
5.10 Enable field firing pulses
5.11 Wait for I
field
(K0265) > I
field set
(K0268)*P398/100%
5.12 Waiting time according to P092.i004 (0,0 to 10,0 s, factory setting 3,0 s)
5.13 Armature firing pulses are possible again