Siemens SIMOTRAS 6SG7050, Operating Instructions Manual

Page: 308 / 604

Function descriptions 01.04
9-10
SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
9.3.3 OFF2 (voltage disconnection): control word 1, bit 1
The “voltage disconnection” command causes the fastest possible disabling of the firing pulses, and
drop out of any line contactor present, if controlled using binector B0124.
The OFF2 signal is low active (log."0" state = voltage disconnection).
The following operating modes are possible:
P648 = 9: The control bits in control word 1 are input bit-serially. OFF2 is generated from the AND
operation between the binectors selected with P655, P656 and P657 (see Section 8,
Sheet G180).
P648
≠
9: The connector selected via P648 is used as control word 1.
Bit 1 of this then controls the OFF2 function.
Sequence of operations for "Disconnect voltage":
1. Input "Disconnect voltage" command
2. Disable ramp-function generator, n and I controllers
3. I
set
= 0 is applied
4. The pulses are disabled when I = 0
5. Output signal "Close operating brake" (binector B0250 = 0, when P080 = 2)
6. Converter reaches operating state o10.0 or higher
7. Any “line contactor” present will drop out if controlled via B0124
8. Drive coasts to a standstill (or is braked by the operating brake)
9. When n < n
min
(P370, P371) has been reached, the "Close holding brake" signal is output
(binector B0250 = 0, when P080 = 1)
9.3.4 OFF3 (Fast stop): control word 1, bit 2
The “fast stop” command causes the fastest possible braking of the drive to a standstill and then
disabling of the firing pulses and drop out of any line contactor present, if controlled using binector
B0124.
The OFF3 signal is LOW active (log."0" state = fast stop).
The following operating modes are possible:
P648 = 9: The control bits in control word 1 are input bit-serially. OFF3 is generated from the AND
operation between the binectors selected with P658, P659 and P660 (see Section 8,
Sheet G180).
P648
≠
9: The connector selected via P648 is used as control word 1.
Bit 2 of this then controls the OFF3 function.
Sequence of operations for ”Fast stop”:
1. Input "Fast stop" command (e.g. binary input wired up to "Fast stop")
2. Ramp-function generator is disabled
3. Enter
n
set
= 0
4. up to SW 1.84: Decelerate along current limit
from SW 1.90: Decelerate along reversal ramp acc. to P296, P297, P298
(plugging)
5. Wait until n < n
min
(P370, P371)
6. Output signal "Close operating or holding brake" (binector B0250 = 0)
7. Wait for brake closing time (P088) to run down
8. Enter
I
set
= 0
9. Ramp-function generator and n controller are disabled
10. The pulses are disabled when I = 0
11. Any “line contactor” present will drop out if controlled via B0124
12. Converter reaches operating state o9.0 or higher