Rockwell Automation 1734-SSI POINT I/O Synchronous Serial Interface Absolute Encoder Module User Manual - Manual (Page 31)

Publication 1734-UM007D-EN-P - December 2005
Set and Operate Your Module 4-3
Sensor Resolution The number of steps per revolution for a rotary sensor, or
total number of steps per stroke for a linear or optical
transducer.
The Sensor Resolution value is not used by the module and
is not needed for proper module operation with your SSI
sensor.
The Sensor Resolution value can be passed to the network
master for processing if desired.
The range is 1…65,535 steps and the default value is 1.
Sensor Cycles The total number of revolutions for a rotary sensor. If you
are using a linear or optical transducer, the value you should
enter for Sensor Cycles is most likely equal to one. Like the
Sensor Resolution parameter, the Sensor Cycle value is not
used by the module and is not needed for proper module
operation with your SSI sensor. Pass the value to the master
if needed.
The range is 1…65,535 steps and the default value is 1.
Data Latch Define an edge of the sourcing I1 input for storing a sensor
position. The choices are the falling edge of I1 (Off-to-ON),
rising edge (On-to-OFF), or both falling edge and rising
edge. The default value for Data Latch is OFF. For operation
details, see operating feature of Data Latch.
Comparator 1 and
Comparator 2 Control You can compare the incoming SSI sensor count to a stored
value, and the module provides notification of the event
when the present sensor value equals or exceeds the stored
value. The module stores two separate comparator values
(1 and 2), governed by separate comparator control values
(1 and 2). Using the comparator control parameter, you can
set the module to flag the event on an increasing,
decreasing, or both (increasing and decreasing) sensor
count.
The default setting for both of the Comparator 1 and
Comparator 2 Control values is OFF.
For operation details, see operating features of Comparator
1 and Comparator 2 Control.
Comparator 1 and
Comparator 2 Value Enter your comparator value into these parameters.
Comparator values can be obtained by moving your SSI
sensor to the position of interest and reading the present
SSI value.
Value Definition