Rockwell-automation 1734-SSI POINT I/O Synchronous Serial Interface Ab Instrukcja Użytkownika Pobierz pdf (Strona 29)

1 Publication 1734-UM007D-EN-P - December 2005

Chapter

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.

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Rockwell-automation 1734-SSI POINT I/O Synchronous Serial Interface Ab Instrukcja Użytkownika Strona 29