Absolute Data Exchange Sequence; Outline Of Absolute Signal - YASKAWA SGM series User Manual

b) The setup procedure is as follows:
1
Turning SGDA Servopack ON
• Wire the SGDA Servopack, motor and encoder in
the normal way.
• Connect the battery and turn the SGDA Servopack
ON.
Turning the Encoder ON
2
• For speed/torque control (SGDA-jjjS), set the
SEN signal at high level. (For position control
(SGDA-jjjP), the encoder is already ON.)
• Keep the encoder turned ON for at least three min-
utes.
• It does not matter even if alarm status arises.
NOTE Setting up the encoder sets the revolution count inside the encoder to 0.
After setting up the encoder, always reset the machine home position. Operating the ma-
chine without the home position being reset does not only damage the machine but may
also cause an accident resulting in injury or death.

7) Absolute Data Exchange Sequence

The Servopack sends absolute data to the host controller when receiving output from a
12-bit absolute encoder. This data exchange sequence is described below.
Use the following detailed information when designing a host controller.
a) Outline of Absolute Signal
The 12-bit absolute encoder outputs PAO,
PBO, PCO and PSO as shown on the
right.
Signal Status
Name
Initial state
PAO PAO
Normal state
Initial state
PBO PBO
Normal state
PCO Normal state
PSO Normal state
3
• Turn the SGDA Servopack OFF, then disconnect
• Short-circuit encoder connector terminals 13 and
4
• Return the wiring to the original state.
• Turn the SGDA Servopack ON and set the SEN
• If alarm "A.00" arises, repeat the same procedure
• If no problem has occurred, the setup procedure is
Contents
Serial data
Initial incremental pulse
Incremental pulse
Initial incremental pulse
Incremental pulse
Home position pulse
Rotation count serial data
3.8 Special Wiring
Resetting Data
the encoder connector.
14 for two seconds or more.
Turning the Power ON
signal at high level. (For position control
SGDA-jjjP, turn the SGDA Servopack ON
only.)
from the beginning.
complete.
Servopack
Frequency
dividing
circuit
3
151