4 . P o s i t i o n i n g U n i ts
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4-11
Description of the CR values
C R # 0 :
Model Type
Set up by the system; read only. You can read the model type in the program to see if the
extension module exists. The model type for the ELC-MC01 is H’0110.
C R # 1 , 2 :
Number of pulses required for 1 motor revolution (A); Range: 1 ~
2,147,483,647 PLS/REV.
1.
Typically, we can set up the electronic gear ratio in the servo drive. Therefore, the
number of pulses required for 1 motor revolution does not always equal the number
of pulses generated by the encoder for 1 servo motor revolution.
Number of pulses required for 1 motor revolution (A)
× electronic gear
(CMX/CDV) = pulses generated by 1 encoder revolution.
2.
The units are set in b0 and b1 of CR#5.. When the units are set as machine units or
combined units, parameter A will be valid.
When the units are set as motor units,
parameter A will be invalid.
C R # 3 , 4 :
Distance the motor rotates for 1 revolution (B); Range: 1 ~ 2,147,483,647
units/REV.
1.
There are 3 units available for b0 and b1 of CR#5.
B = 1 ~ +2,147,483,647 (um/Rev, mdeg/Rev, 10
-4
inch/Rev)
2.
The units are set in b0 and b1 of CR#5.. When the units are set as machine units or
combined units, parameter B will be valid.
When the units are set as motor unit,
parameter B will be invalid.
C R # 5 :
Parameter setting
b0 ~ b15 represents the following:
1.
The units are set in b0 and b1 of CR#5
b1
b0
Unit
Explanation
0 0 Motor Units:
pulses
0
1
Machine
Units: length, angle
1 0
1 1
Combined
Units for position: length, angle (machine units)
Unit for speed: pulses (motor units)
