Jetter JetWeb JX2-CNT1, User Manual

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JX2-CNT1 11 SSI Absolute Encoder
Jetter AG 69
11 SSI Absolute Encoder
JX2-CNT1 modules are able to read in SSI absolute encoder signals (SSI =
S ynchronous S erial I nterface) with a resolution of 10 - 24 bits in various data formats.
For more information refer to “Reading in SSI data" on page 69. Signal decoding for
Gray or binary code is available. Automatic parity check of data transmission is also
available if the encoder sends a parity bit.
For technical information on the SSI interface refer to "Technical Data" in chapter 5
"Technical Data", page 27. For information on installation refer to chapter 6.8 "SSI
Encoder", page 42.
11.1 Reading in SSI data
The following subchapters first introduce the data formats prevailing in the market.
Then, this manual explains which data formats can be read by the JX2-CNT1 and
how they are read in.
The position value which has been read in can be seen from register 3xx0 "Count
value".
Output xx04 = 1
Register 3xx0: Count value
Function Description
Read Actual count value of the SSI encoder
Write Illegal
Value range Depending on the position resolution of the encoder
Value following reset 0