Input word 1 – Rockwell Automation 1746-HSTP1 Stepper Controller Module/ User Manual User 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