Yamaha CL Series System Design Manual page 6

For the original R series units, set the Unit ID while the device is powered off (any change will not be
detected while the unit is on). Push dip switch 1 down to access additional ID numbers.
Rio-D2 Unit ID
For these devices, the Unit ID must be set while it is powered on, using the front panel display.
1. Enter the SETUP menu and press the left MENU button until the UNIT ID section is highlighted
2. Rotate the encoder until the desired ID number is shown. It can be in the range "Y000" to
"Y07F".
3. Push the encoder to set the UNIT ID number.
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