Functions Of The 1Ssi; Overview Of 1Ssi Functions - Siemens SIMATIC ET 200S Operating Instructions Manual

4.6

Functions of the 1SSI

4.6.1

Overview of 1SSI functions

Operating Principle
The 1SSI records the signals of the connected position encoder cyclically and forwards
them, depending on the parameter assignment, to the feedback interface by means of the
following functions:
• Encoder value detection
• Gray/binary converter
• Normalization
• Direction reversal
• Comparator (only in standard mode)
• Latch function (only in standard mode)
• Error detection
• Sign of life
The 1SSI uses the "ready for operation" feedback bit to indicate that the functions are
executable and the displayed encoder value is valid.
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
1SSI
4.6 Functions of the 1SSI
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