09.02  Start-Up 
Siemens AG    6SE7087-6AK85-1AA0 
4-19 
Rectifier/Regenerating Unit    Operating Instructions 
Bit 3:  Run enable command (H  "Run enable") 
The RUN ENABLE command (firing pulse enable) is implemented with an H signal. 
After the command has been accepted: 
♦  If the READY status (011) still applies. 
Changeover to the RUN status (014); the firing pulses are enabled and the voltage setpoint is approached 
over the pre-charging ramp. 
Bit 3:  Run inhibit command (L  "Run inhibit") 
The RUN INHIBIT command (firing pulses disabled) is implemented with an L signal. 
After the command has been accepted: 
♦  If the RUN status (014) applies: 
Changeover to the READY status (01); the firing pulses are inhibited. 
Bit 4 to 6: reserved 
Bit 7:  Acknowledge command  (↑  "Acknowledge") 
The command is executed with a positive edge change from L to H (L →  H) only in the FAULT status (007). 
After the command has been accepted: 
♦  All actual faults are deleted after having been previously transferred into the diagnostics memory 
♦  If no faults are present: 
The drive changes into the status SWITCH-ON INHIBIT (008) 
♦  If actual faults are present: 
The drive remains in the FAULT status (007). 
NOTE 
The acknowledge command is simultaneously effective from three sources (P565, P566 and P567) and 
always from the PMU! 
 
Bit 8:  Inching 1 ON command (↑  "Inching 1 ON") 
The command is executed with a positive edge change from L to H (L → H) only in the READY-TO-SWITCH-
ON status (009). 
After the command has been accepted 
♦  an ON command is automatically executed (description, refer to control word bit 0). 
Bit 8:  Inching 1 OFF command (L "Inching 1 OFF") 
The command is executed with an L signal. 
After the command has been accepted: 
♦  An OFF 1 command is automatically executed (description, refer to control word bit 0). 
Bit 9:  Inching 2 ON command (↑  "Inching 2 ON") 
The command is executed with a positive edge change from L to H (L → H) only in the READY-TO-SWITCH-
ON status (009). 
After the command has been accepted 
♦  an ON command is automatically executed (description, refer to control word bit 0). 
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