B-2  Sequencing Logic 
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D 
Principle State Machine 
Main Sequencing States 
The main sequencing state of the unit is indicated by an enumerated value given by the parameter 
SEQUENCER STATE under SEQUENCING LOGIC menu. 
0  START DISABLED  Switch On Disabled 
The Drive will not accept a switch on 
command  
1  START ENABLED  Ready To Switch On 
The Drive will accept a switch on 
command 
2  SWITCHED ON  Switched On  The Drive’s stack is enabled 
3  READY  Ready  Waiting for Contactor to be closed 
4  ENABLED  Enabled  The Drive is enabled and operational 
5  F-STOP ACTIVE  Fast-Stop Active  Fast stop is active 
6  TRIP ACTIVE  Trip Active  The Drive is processing a trip event 
7  TRIPPED  Tripped  The Drive is tripped awaiting trip reset 
Table B-1  Enumerated Values for the SEQUENCING LOGIC Function Block