Omron NX-EC0112, User Manual

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7 SSI Input Units
NX-series Position Interface Units User’s Manual (W524)
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Additional Information
The status data in the input area is not used when No change is selected. This data will always
be 0.
This method divides SSI data up into multi-turn data, single-turn data, and status data. Then, the
encoder present position is calculated from the multi-turn data and single-turn data based on the
encoder resolution and sent to the input area along with the status data.
Additional Information
If the set value of the Encoder Resolution parameter is 0, the resolution is calculated as the
maximum value of the single-turn data plus 1.
Select this method when the data format from the encoder is gray code.
Received SSI data is converted to binary and processed in the same way as for binary code output,
and then the encoder present position and status data are sent to the input area.
Output Binary Codes
Changing Gray Codes to Binary Codes
Valid SSI data (data after the bits are shifted)
Encoder present position (input area) Status data (input area)
Multi-turn data
× Encoder resolution
+ +
Single-turn data
Status data
Encoder present position (input area)
Status data (input area)
Multi-turn data
× Encoder resolution
Valid SSI data (data after the bits are shifted)
Gray code converted to binary.
Single-turn data Status data
+ +
Multi-turn data Single-turn data