Omron CQM1 Operation Manual page 60

Switch Settings
Pin 1 Output Word Setting:
Sets the number of output words (points) occupied at the Expansion Master.
Setting
ON One word (16 points) of outputs.
OFF Two words (32 points) of outputs.
Note 1. Turn the CQM1H/CQM1 power off before setting the DIP switch. The
switch settings are enabled when the CQM1H/CQM1 power is turned on.
2. Use a different Unit number for each of the two Expansion Masters used
with a single Master.
3. Slave address for Unit 2 can only be used for an 8-point or 16-point Slave.
It cannot be used for a 4-point Slave.
Description
Section 2-2
41