LEGRAND Raritan PX3TS User Manual page 490

Chapter 7: Using the Web Interface
470
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A master device shows 0 (zero) in the 'Cascade position' field and yes in
the 'Cascaded device connected' field.
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A slave device in the middle position shows a non-zero number which
indicates its exact position in the 'Cascade position' field and yes in the
'Cascaded device connected' field.
The following diagram shows 1, indicating it is the first slave device -
Slave 1.
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The final slave device shows a non-zero number which indicates its
position in the 'Cascade position' field and no in the 'Cascaded device
connected' field.