Siemens Simovert 6SE70 Series Operating Instructions Manual page 104

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Bits 20 to 22: reserved
Bit 23: 12-pulse mode selection command (H "12-pulse mode is selected")
The command is executed with an H signal and causes a change in operational behavior from that of a single
unit (i.e. a "normal" single unit becomes a 12-pulse master or a 12-pulse slave depending on parameter P587
or control word bit 27). See Section 3.8.4 for further details.
Bits 24 and 25: reserved
Bit 26: Fault, external 2 command (L "Fault, external 2")
The command is recognized with an L signal and does not become active until the pre-charging time (P329)
and an additional time delay of 3000 ms has elapsed when the operating mode RUN is active. During formation
(P052=20) or circuit identification (P052=21), the command is ineffective.
After the command has been accepted
♦ Changeover to the FAULT status (007) (fault F036)
The firing pulses are inhibited and the main contactor, if installed, drops out (see also Chapter 7 "Faults and
Warnings").
Bit 27: Master/slave changeover (H "Slave S/F unit"/L "Master S/F unit")
The command switches between slave and master mode.
Slave S/F unit:
Master S/F unit:
Bit 28: Alarm, external 1 command (L "Alarm, external 1")
The command is executed with an L signal.
After the command has been accepted
♦ The operating status is retained. An alarm message (A015) is output (also refer to Section 7 "Fault and
Alarm Messages")
Bit 29: Alarm, external 2 command (L "Alarm, external 2")
The command is executed with an L signal.
After the command has been accepted:
♦ The operating status is retained. An alarm message (A015) is output (also refer to Section 7 " Fault and
Alarm Messages ")
Bit 30: Selection, basic/reserve setting command (L "Basic setting / H "Reserve setting")
The command activates the BASIC SETTING with an L signal and the RESERVE SETTING with an H signal
After the command has been accepted:
♦ The parameter settings of the basic or reserve setting for the control word itself, the setpoint channel, and
the closed-loop control are activated (see "Data sets" in Section 4.1.2 and "Selecting the data sets" in
Section 4.4).
Bit 31: Main contactor checkback signal command (H "Main contactor checkback signal")
This command permits you to include an auxiliary contact of the main contactor in the unit control circuit (an H
signal implies that the main contactor has picked up).
After the command has been accepted:
♦ An operating status > o 010 is permitted
4-22
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The closed-loop control operates with an external DC link current setpoint
Even when a thyristor test is selected (P353=1, 2 or 3) if Ud > 5% it does not wait in
o
state 012 and the thyristor test is not carried out.
The closed-loop control operates with an external DC link current setpoint
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Rectifier/Regenerating Unit Operating Instructions
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09.02