09.02
Start-Up
Siemens AG 6SE7087-6AK85-1AA0
4-27
Rectifier/Regenerating Unit Operating Instructions
Bit 13: Message, "Ud reduced" (H)
An H signal indicates that the DC link voltage has been reduced below the following value:
071
P
35
.
1
%
100
%
2
%
100
318
P
U
35
.
1
*
*
*
*
rectifier
,
Supply
+
The signal changes from H to L when the DC link voltage exceeds the following threshold:
071
P
35
.
1
%
100
319
P
%
2
%
100
318
P
U
35
.
1
*
*
*
*
rectifier
,
Supply
⎟
⎠
⎞
⎜
⎝
⎛
+
+
L signal ("Ud not reduced") is also output for as long as control word 1, Bit 11=0 ("No Ud reduction requested")
is pending and for as long as no Ud reduction command for current-dependent Ud reduction has been
generated internally.
Bit 14: Message, " Motoring mode" (H)
An H signal indicates that the rectifier bridge is carrying current or is ready to carry current or that neither the
rectifier nor the regenerating bridge is carrying current.
Message, " Generating mode" (L)
An L signal indicates that the regenerative bridge is carrying current or is ready to carry current or that neither
the rectifier nor the regenerating bridge is carrying current.
Bits 15 to 17: reserved
Bit 18: Message, "Current limit active" (L)
An L signal indicates that the rectifier/regenerating unit is operating at the current limit. If the message is output
at a terminal (CUR, SCB1), an L signal appears there for this message
Bit 19: Signal, "Fault, external
1" (H)
An H signal indicates that a "Fault, external 1" is present in control word bit 15. If this fault is output at a terminal
strip (CUR, SCB1), an L signal appears there for this fault signal.
Bit 20: Signal, "Fault, external
2" (H)
An H signal indicates that a "Fault, external 2" is present in control word bit 26. If this fault is output at a terminal
strip (CUR, SCB1), an L signal appears there for this fault signal.
Bit 21: Signal, "External alarm" (H)
An H signal indicates that an "Alarm, external 1" is present in control word bit 28, or an "alarm, external 2" in
control word, bit 29.
If this fault is output at a terminal strip (CUR, SCB1), an L signal appears there for this fault signal.
Bit 22: Signal, "Alarm I
2
t power section" (H)
H signal indicates that the "I
2
t alarm power section" (A025) is present. Also refer to Section 7 "Fault and Alarm
Messages".
If this alarm is output at a terminal strip (CUR, SCB1), an L signal appears there for this fault signal.
Bit 23: Signal "Overtemperature fault signal
power section (H)
An H signal indicates that an "Power section temperature too high" fault (F023) is present. Also refer to Section
7 "Fault and Alarm Messages".
If this fault is output at a terminal strip (CUR, SCB1), an L signal appears there for this fault signal.
Bit 24: Signal "Overtemperature alarm
power section" (H)
An H signal indicates that the "Power section temperature too high" alarm (A022) is present. Also refer to
Section 7 "Fault and Alarm Messages". If this fault is output at a terminal strip (CUR, SCB1), an L signal
appears there for this fault signal.
Bits 25 to 30: reserved
Bit 31: Signal, "Pre-charging active" (H)
An H signal indicates that the DC link has been charged following a successful ON command.
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