Rockwell Automation 1746-HSTP1 Stepper Controller Module/ User Manual - Manual (Page 59)

Publication 999-121 - December 1999
5-24 Configuration and Programming
Notes:
1. Direction of travel (CW or CCW) is established looking at the
shaft end of the stepper motor.
2. Bit 11 (Input Error) is set by activating either the CW or CCW
limit switch, or by an immediate stop input. It can only be
cleared by a home or a preset operation. The input error flag is
not set if the correct end limit is reached during a normal home
move operation, since reaching the end limit is an integral part
of the home move operation.
3. Bit 14 (Module OK) is set as long as the Module is operating
normally. Only a fatal error can reset this bit.
Input Word 1
bit 0 is set when CW limit switch input is active
bit 1 is set when CCW limit switch input is active
bit 2 is set when immediate stop input is active
bit 3 is set when external interrupt input is active
bit 4 is set when home limit switch input is active
bit 5 is set when home proximity limit switch input is active
bits 6-7 not used
bit 8 Home Invalid Bit
bits 9-15 not used