Omron CS1W-MC221 - 02-2008 Operation Manual page 508

Setting the Origin With an Absolute Encoder
9-6-3 Moving to the Origin
Performing an Origin Search
1,2,3...
The Absolute Encoder will receive a 5-V power supply. Leave the power
ON for at least 3 minutes to fully charge the backup capacitor. Do not issue
servo-lock commands from the MC Unit during this operation.
MC Unit
4. Turn OFF the Power of Servo Driver and MC Unit, then disconnect the en-
coder connector.
5. Short-circuit the encoder connector terminals 13 and 14 for one to two sec-
onds if the Absolute Encoder is a 30- to 750-W model. Short-circuit the en-
coder connector terminals R and S for two minutes or more if the Absolute
Encoder is a 1- to 5-kW model.
30- to 750-W model
Short-circuit terminals 13 and
14 for 1 to 2 s.
Note If the Absolute Encoder is a 1 to 5-kW model, check the voltage between ter-
minals R and S on the Servomotor side after the terminals have been short-
circuited for two minutes or more and the short-circuiting wire has been
removed. If the voltage is more than 0.4 V then, short-circuit the terminals
again.
6. Reconnect the encoder connector.
7. Turn ON the Servo Driver first and then the MC Unit. Then, initialize the MC
Unit.
Use either of the following methods to move to the origin.
• Perform an origin search.
• Execute jogging without an origin search.
1. Set the system to the servo-lock state.
At this point, the MC Unit will read the absolute position from the Absolute
Encoder. The absolute data read will be used to determine a tentative ori-
gin.
2. Perform an origin search.
Refer to page 466 Using Incremental Encoders to perform the origin
search.
Servo Driver
Turn ON SEN
signal
Battery
1- to 5-kW model
Short-circuit terminals R and S
for 2 min or more.
Section 9-6
Motor (Encoder)
481