4.DESCRIPTION OF PARAMETERS B-64120EN/01
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-9965000 (the reference position is on the negative side)
[Setting parameter No. 1883] (For an encoder with absolute address reference marks (linear scale or
rotary encoder))
If it is difficult to measure the distance from the zero point of the
encoder to the reference position (parameter No. 1883), the distance
can be obtained by following the steps below:
1 Set the following parameters to use the encoder with absolute address
reference marks (linear scale or rotary encoder):
OPTx(No.1815#1)=1,DCLx(No.1815#2)=1,DCRx(No.1815#3)=0/1
Set appropriate values in parameter Nos. 1821 and 1882.
Set parameter No. 1240 to 0.
Set parameter Nos.1883 and 1884 to 0.
2 Establish the reference position at an appropriate position.
(As a result of this, the machine coordinate value shows the distance
from the zero point of the encoder to the current position.)
3 Perform a jog feed or handle feed to position the machine at the
accurate reference position.
4 In parameter No. 1883, set the result of the conversion of the machine
coordinate value observed at this point of time (diagnosis screen No.
301) into the detection unit (by multiplying the value on diagnosis
screen No. 301 by CMR).
5 If necessary, set parameter No. 1240.
NOTE
This method does not apply if the distance from the
zero point of the encoder to the reference position
exceeds 99,999,999.
[Setting parameter No. 1883] (For an encoder with the absolute address zero point (linear scale or
rotary encoder) (detection circuit C))
The value to be set can be obtained by following the steps below.
1 Set bit 1 (OPTx) of parameter No. 1815 to 0 or 1, and bit 2 (DCLx) of
parameter No. 1815 to 1 to use the encoder with the absolute address
zero point (linear scale or rotary encoder) (detection circuit C).
Set parameter No. 1240 to 0.
Set parameter Nos. 1883 and 1884 to 0.
2 Establish the reference position at an appropriate position.
(As a result of this, the machine coordinate value shows the distance
from the zero point of the encoder to the current position.)
3 Perform a jog feed or handle feed to position the machine at the
accurate reference position.
4 In parameter No. 1883, set the result of the conversion of the machine
coordinate value observed at this point of time (diagnostic screen No.
301) into the detection unit (multilication of the value on diagnostic
screen No. 301 by CMR).
5 If necessary, set parameter No. 1240.