Confirming Unit Settings and Design Contents | FP2−CCU |
3.2Confirming the I/O Allocation and Root No.
3.2.2Confirming 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
Root No. 1
Root No. 2
Root No. 3
Computer Communication Unit 
Multi−wire Link Unit (MEWNET−W mode)
Tip
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.
3 − 6