Omron NX-EC0112, User Manual

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6 Incremental Encoder Input Units
6 - 48 NX-series Position Interface Units User’s Manual (W524)
Precautions for Correct Use
• When an Incremental Encoder Input Unit is used as an MC Function Module axis (encoder
axis) and the counter type is set to a linear counter, counting for the encoder axis stops when
the count value reaches the maximum or minimum value. At this point, the correct position of
the encoder can no longer be obtained, so the position must not be used.
• Set the encoder type to a ring counter to use the encoder as an MC Function Module
encoder axis.
This counter counts up and down between a maximum counter value and a minimum counter value.
The following table shows the allowed range for the maximum and minimum counter values.
If the counter value exceeds the maximum counter value, the counter value returns to the minimum
counter value to continue the counting operation. If the counter value exceeds the minimum counter
value, the counter value returns to the maximum counter value to continue the counting operation.
Precautions for Correct Use
To use the encoder as an MC Function Module axis, set the maximum counter value to
2,147,483,647 (7FFFFFFF hex) and set the minimum counter value to
−
2,147,483,648
(80000000 hex).
MC Function Module setting Ring counter Linear counter
Use as an axis. Applicable Do not use.
Do not use as an axis. Applicable Applicable
Ring Counter
Parameter name Setting Default Remarks
Maximum Counter
Value 1 to 2,147,483,647
(00000001 to
7FFFFFFF hex) 2,147,483,647
(7FFFFFFF hex) Changes are applied when the power sup-
ply to the NX Unit is turned ON or the NX
Unit is restarted.
The unit is pulses.
Minimum Counter
Value
−
2,147,483,648 to 0
(80000000 to
00000000 hex)
−
2,147,483,648
(80000000 hex)
0
Maximum Counter value
Minimum Counter value