Omron SYSMAC CS1W-SCB41-V1 Operation Manual page 294

Overview of 1:N NT Links
5. NT Link serial communications are unique and are not compatible with oth-
er serial communications modes.
Example for NT31/NT631(C) PTs
Priority
Registered
PTs per port
Priority Not
Registered
PTs per port
6. The NT20S, NT600S, NT30, NT30C, NT620, NT620C, and NT625C can-
not be used if the cycle time of the CPU Unit is 800 ms or longer (even if
only one of these PTs is used in a 1:N NT Link).
7. With some PTs, timeout settings can be changed to eliminate some of the
communications errors. Refer to the operation manual for the PT for de-
tails.
8. If more PTs are required by the system than allowed by the above restric-
tions, connect the PTs in smaller groups to different ports and increase the
number ports by adding Serial Communications Units or a Serial Commu-
nications Board (if one is not already being used).
CPU Unit's cycle time (ms)
CPU Unit's cycle time (ms)
Section 8-1
265