Rockwell Automation 1734-SSI POINT I/O Synchronous Serial Interface Absolute Encoder Module User Manual - Manual (Page 29)

1 Publication 1734-UM007D-EN-P - December 2005
Chapter
4
Set and Operate Your Module
About This Chapter Read this chapter for information about setup and operation of your
module.
You need to alter the 1734-SSI module configuration, special data
latch feature, and comparator feature in order for the 1734-SSI module
to operate properly with your SSI sensor.
To quickly configure the 1734-SSI module for use with your SSI
sensor, change only the following values if they are different from the
module default values:
• Data type
• SSI word length
• Data rate
• SSI word delay
Module Configuration
Value Definitions
Value Definition
RUN The SSI clock output to the SSI sensor can be turned ON or
OFF by changing the RUN setting. You may find this feature
useful during machine setup or maintenance. The default
setting for RUN is ON. When you first apply power to the
module, the SSI clock output is active. The green LED on the
front of the module indicates the RUN status, as well as Bit
1 or Byte 0 in the module status word (produced byte 8, Bit
1; 1 = RUN ON, 0 = RUN OFF).
Data Type This refers to the code type of your SSI sensor. The
1734-SSI module supports Gray and Binary code types.
The module default is Gray.
You must have the right code type selected so that other
module features operate correctly.
SSI Word Length The number of bits in a single SSI word is completely
determined by the SSI sensor.
See the manufacturer’s data sheet for the sensor output
word size. The word length setting range is 2…31 bits. The
default SSI word length is 13 bits.