Omron NX-EC0112, User Manual

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7 SSI Input Units
7 - 42 NX-series Position Interface Units User’s Manual (W524)
This section provides setting examples for four different encoder formats.
 Single-turn 13-bit Data
Note S0, S1, etc., are the data bits that give the absolute position during a single rotation.

Multi-turn 25-bit, Multi-turn 12-bit, and Single-turn 13-bit Data
Multi-turn Data Start
Bit
*3
0 to 31 (bit) 0 Set the start bit position for multi-turn data.
Multi-turn Data
Length
*3*5
0 to 32 (bits) 12 Set the data length for multi-turn data.
Status Data Start Bit
*4
0 to 31 (bit) 0 Set the start bit position for status data.
Status Data
Length
*4*5
0 to 32 (bits) 0 Set the data length for status data.
Encoder Resolution
*6
0 to 4294967295 0 Set the single-turn resolution.
If this parameter is set to 0, the resolution is
the maximum setting value for single-turn
data + 1.
*1. Set the time that is required for the SSI encoder to output data again. This time depends on the SSI encoder.
Set it according to the specifications of the SSI encoder that is connected.
*2. If the sum of the values set for the Single-turn Data Start Bit and the Single-turn Data Length parameters is
greater than the Valid Data Length parameter, SSI communications are disabled and an SSI Data Setting Error
event occurs.
*3. If the sum of the values set for the Multi-turn Data Start Bit and the Multi-turn Data Length parameters is greater
than the Valid Data Length parameter, SSI communications are disabled and an SSI Data Setting Error event
occurs.
*4. If the sum of the values set for the Status Data Start Bit and the Status Data Length parameters is greater than
the Valid Data Length parameter, SSI communications are disabled and the SSI Data Setting Error event oc-
curs.
*5. If the sum of the values set for the Multi-turn Data Length, Single-turn Data Length, and Status Data Length
parameters is greater than 32, SSI communications are disabled and an SSI Data Setting Error event occurs.
*6. If the resolution is greater than the range represented by the value set for the Single-turn Data Length param-
eter, SSI communications are disabled and an SSI Data Setting Error event occurs.
Encoder Setting Examples
Received frame bit positions
0: MSB 1 2 3 4 5 6 7 8 9 10 11 12
S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0
Valid
data
length
Single-turn data
start bit
Single-turn
data length Multi-turn data
start bit
Multi-turn
data
length
Status data start
bit
Status
data
length
13 0 13 0 0 0 0
Received frame bit positions
0: MSB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
M11 M10 M9 M8 M7 M6 M5 M4 M3 M2 M1 M0 S12 S11 S10 S9 S8
Received frame bit positions
17 18 19 20 21 22 23 24
S7 S6 S5 S4 S3 S2 S1 S0
Parameter name Setting Default Remarks