YASKAWA SGM-A3 User Manual page 166

Use the following user constant to set the number of pulses for the absolute en-
coder to be used:
PULSNO
Number of Encoder
Cn-11 Pulses
Sets the number of encoder pulses according to the servomotor type to be used.
After changing this user constant setting, turn the power OFF, then ON. This makes the
new setting valid.
Motor Type
SGM-jjj31j
SGMP-jjj31j
SGM-jjjW1j
SGMP-jjjW1j
5) Using a Battery
Use the following battery to enable the absolute encoder to store position information
even when the power is turned OFF. Load the battery in the host controller and connect it
to Servopack input terminals BAT and BAT0.
Recommended battery: Recommended battery:
Lithium battery
Toshiba Battery ER6V C3 Type
3.6 V, 2000 mAH
6) Setting up Absolute Encoder
a) Set up the absolute encoder in the following cases:
• When starting the machine for the first time
• When the absolute encoder is not connected to power supply or backup power supply
(battery) for more than two days
Improper setup may cause malfunctions such as improper encoder operation and/or
NOTE
strain on the battery. Follow the setup procedure on the next page.
Unit: Setting
P/R Range:
Number of
Encoder
Pulses
Number of Encoder Pulses Per Revolution
Incremental encoder: 2048 pulses per revolution
:
Absolute encoder 1024 pulses per revolution
D Connect the battery securely to prevent contact faults Connect the battery securely to prevent contact faults
resulting from environmental changes or aging.
D Battery voltage is not monitored inside the Servopack.
Provide a battery voltage monitor circuit as necessary.
Minimum voltage: 2.8 V
3.8 Special Wiring
Factory For Speed/Torque
Setting: Control and Position
2048 Control
Preset
Value
2048
1024
3
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