09.02  Connection 
Siemens AG    6SE7087-6AK85-1AA0 
3-55 
Rectifier/Regenerating Unit    Operating instructions 
"12-pulse master"-6SE70 unit  "12 pulse slave"-6SE70 unit 
Function: Controls the DC link voltage and provides 
the setpoint current for the 12-pulse slave unit
 via 
the SST2 interface and control commands (and 
receives control commands). 
Function
: In current control mode, receives the 
setpoint current and control commands via the SST2 
interface from the 12-pulse master (and sends 
control commands). 
P051= 3 (Access level: Expert mode)   P051= 3 (Access level: Expert mode) 
SST2 interface definition: 
P688= 1 (protocol selection "Peer-to-Peer
") 
P684.i003= 13 (baudrate 187500 Bd)  
(factory setting) 
P686.i003= 2 (2 process data words)  
(factory setting) 
P687.i003= 1 ms (telegram failure time)  
(factory setting)         (see Section 3.8.6) 
SST2 interface definition
: 
P688= 1 (protocol selection "Peer-to-Peer
") 
P684.i003= 13 (baudrate 187500 Bd)  
(factory setting) 
P686.i003= 2 (2 process data words)  
(factory setting) 
P687.i003= 1 ms (telegram failure time)  
(factory setting)         (see Section 3.8.6) 
SST2 send channel: 
P681.i001= 599 (1st process data item is 
control/status word for 12-pulse mode)  
(factory setting) 
P681.i002= 34 (2nd process data item is the 
setpoint current) 
(factory setting) 
SST2 send channel: 
P681.i001= 599 (1st process data item is 
control/status word for 12-pulse mode)  
(factory setting) 
 
 
Use of SST2 receive data: 
P573.i001 (or i002) = 6001 (1st receive data is 
source for "No external fault 3") 
(but should only be parameterized when the 12-
pulse master is required to go into the "fault" state in 
the event of a 12-pulse slave fault - see Section 
3.8.6) 
Use of SST2 receive data
: 
P554.i001 (or i002) = 6001 (ON/OFF1) 
P555.i001 (or i002) = 6001 (not OFF2) 
(with the "fault" state for the 12-pulse master or 
when "no 12-pulse mode" is selected on the 12-
pulse master (see P583.i001 or i002), OFF2 is 
signaled) 
P561.i001 (or i002) = 6001 (Run enable)  
(the 12-pulse slave only receives the run enable 
when the 12-pulse master is in the "run" state) 
P566.i001 (or i002) = 6001 (RESET)  
(Source 2 for reset... this facilitates an external reset 
from the master)  
P572.i001 (or i002) = 6001 (REGEN. ENABLE) 
(to facilitate, e.g. Ud reduction) 
P486.i001 (or i002) = 6002 (2nd receive data item is 
the setpoint current
) 
Definition of the unit as a 12-pulse unit: 
P583.i001 (or i002) = 1 (12-pulse mode is selected) 
Definition of the unit as a 12-pulse unit: 
P583.i001 (or i002) = 1 (12-pulse mode is selected) 
Definition of the unit as a master or slave: 
P587.i001 (or i002) = 0 (master) 
(factory setting) 
Definition of the unit as a master or slave: 
P587.i001 (or i002) = 1 (slave) 
Special functions: 
P354 = 0 (Earth short-circuit test deactivated when 
the unit is supplied by a non-earthed supply - e.g. 
from the delta winding of the 12-pulse transformer) 
Special functions: 
P354 = 0 (Earth short-circuit test deactivated when 
the unit is supplied by a non-earthed supply - e.g. 
from the delta winding of the 12-pulse transformer) 
Table 12  Parameterization for 12-pulse mode 
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