Datasheet

CompoBus/S Master Unit 239
Programmable
Controllers
Communiccations
Note: 1. For 16 Slaves or fewer: Main: 100 m, Total branch: 50 m.
2. No restrictions on branching method or individual line lengths. Connect terminating resistance to Slave farthest from Master.
Performance
CompoBus/S Master Unit
Communications method Special CompoBus/S protocol
Coding Manchester
Connections Multidrop, T-branch (requires termination)
Baud rate High-speed mode: 750 kbps
Long-distance mode: 93.75 kbps. Set via DIP switch. (Set via DM Area, Default: 750 kbps)
Communications cycle time High-speed mode 0.5 ms (with 8 input and 8 output Slaves)
0.8 ms (with 16 input and 16 output Slaves)
Long-distance mode 4.0 ms (with 8 input and 8 output Slaves)
6.0 ms (with 16 input and 16 output Slaves)
Media 2-conductor cable (VCTF 0.75 x 2), 4-conductor cable (VCTF 0.75 x 4), or Special Flat Cable
Maximum communications distance With 2-conductor Cable
Mode Main Branch Total branch
High-speed 100 m 3 m 50 m
Long-distance 500 m 6 m 120 m
With 2-conductor or Special Flat Cable
Mode Main Branch Total branch
High-speed
(See note 1.)
30 m 3 m 30 m
Long-distance
(See note 2.)
Any up to 200 m total
Max. No. of nodes 32
Error control checks Manchester code, frame length, and parity checks
Name Classification Communications function Specifications Unit numbers Model number
CompoBus/S Master
Unit
Special I/O Unit Remote I/O communications Mountable Units: 40 0 to 94 (when 2 unit numbers are allo-
cated to each Master)
0 to 95 (when 1 unit number is allocated
to each Master)
CJ1W-SRM21
Y201-EN2-03.book Seite 239 Donnerstag, 30. März 2006 1:52 13