Panasonic FP2 - Manual (Page 28)

FP2−CCU Confirming Unit Settings and Design Contents
3 − 6
3.2 Confirming the I/O Allocation and Root No.
3.2.2 Confirming Root No.
If multiple Computer Communication Units have been installed, they are labeled “Root
No. 1”, “Root No. 2”, and “Root No. 3” in sequential order, starting from the unit closest
to the CPU unit.
Root numbers are not used directly in the handling of the Computer Communication Unit,
but if a Multi−wire Link Unit is being used at the same time, these numbers are
sometimes specified on the Multi−wire Link Unit side.
Example:
When two Multi−wire Link Units and one Computer
Communication Unit are being installed
Multi−wire Link Unit
(MEWNET−W mode)
Computer Communication Unit
Root No. 1
Root No. 2
Root No. 3
If a Multi−wire Link Unit set to the MEWNET−W mode has also been
installed, the root numbers are set so that the Multi−wire Link Unit is also
included.
Tip