Omron CS1W-MCH71 -, Руководство по эксплуатации

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Input Signals Required for Origin search
Section 8-2
8-2 Input Signals Required for Origin search
The following input signals and conditions are required to perform the origin
search operation.
CW/CCW Limit Signals These signal inputs indicate the maximum operating range of the work when
the motor rotates in the direction of clockwise (CW) or counterclockwise
(CCW).
Origin Proximity Signal This signal input indicates that the axis is near the origin.
Encoder Phase-Z Signal This signal will be output when the encoder makes one revolution.
The first phase-Z input position after the origin proximity signal input changes
from ON to OFF becomes the actual machine origin.
External Input signal 1,2,
and 3 Instead of encoder phase-Z signal, one of these signals determines the actual
machine origin. The signal to be used can be selected in the system parame-
ter [P4AA06: Origin determine signal].
8-3 Origin Search Methods and Parameters
8-3-1 Origin Search Methods
There are four possible settings for the origin search methods.
Origin at Power ON Mode • The position of the motor when the power is turned ON is defined as the
origin automatically.
• If an origin search is performed in this mode, the position where the origin
search is started will become the origin.
Limit Reversal Mode • The direction will be reversed if a limit input signal is input during the ori-
gin search.
• After starting the operation towards Origin search start direction at Origin
search feed rate, when Origin proximity signal input (normally open) is
turned ON, the speed will be changed to Origin search approach speed.
At the rise of Origin determine signal input after the Origin proximity signal
input has been turned OFF, the speed is changed to Origin search creep
speed. The axis travels for the final travel distance to define an origin.
• When there is no Origin proximity signal input, a limit signal input can be
used instead.
2-level Speed in One
Direction Mode • The origin search is performed only in one direction.
• After starting the operation towards the phase-Z detection direction at Ori-
gin search approach speed, the speed will be changed to Origin search
creep speed at the rise of the Origin determine signal input and the axis
travels for the final travel distance to define an origin. An alarm will occur if
a limit signal input is received before the origin proximity signal input.
Parameter Description
CW/CCW Limit Signals Normally closed switches are required.
Origin Proximity Signal The logic of the input signal can be changed in the
parameter, so either Normally closed or Normally open
switch can be used.
Encoder Phase-Z Signal Built-in signal of the encoder on the servomotor.
External Input Signal 1,2,
and 3 Normally open switches are used, and connected to the
servo driver.