Rockwell Automation 1771-QA Stepper Positioning Assembly User Manual - Manual (Page 16)

2–6 Assembly and Installation
Publication 1771-UM002A–EN–P – May 2000
Other translators are designed to receive only one pulse train at a
single “pulse” terminal. These translators usually have a separate
terminal for direction information. If a high (or low) signal is sent to
the “direction” terminal, the stepping motor rotates in the reverse
direction. If a low (or high) signal is sent to this terminal, the
stepping motor rotates in the forward direction. The rate of rotation
(in either direction) is controlled by the pulse train at the “pulse”
terminal.
The status of the pulse output expander module’s outputs when
motion has stopped is also user-selectable.
The settings of switch assembly S1 for the output format are
summarized in Table 2.B.
Input Logic (S2)
The choice of low true or high true logic for manual control of the
pulse output expander module’s hardware inputs is user-selectable.
The S2 switch assembly settings are summarized in Table 2.C.
Table 2.C
Input Logic (S2)
Switch
Number Motion Control Input Logic
1 STOP OFF = High true
ON = Low true
2 JOG
FORWARD
OFF = High true
ON = Low true
3 JOG
REVERSE
OFF = High true
ON = Low true
Expander Module Address (S3)
Each pulse output expander module must have its own (binary)
address for communication with the stepper controller module.
Allowable addresses are 1 (001), 2 (010) or 3 (011). They can be set
using switches 1 and 2. Switch 3 is always off. No other
combinations of the S3 switch assembly settings are valid. Refer to
Table 2.D.