| 摘要 |
PROBLEM TO BE SOLVED: To easily extend a unit.SOLUTION: A first unit block 2a includes: a CPU unit 10; a plurality of I/O units 11; and an end unit (terminal unit) 12. The first unit block 2a includes an extended unit 21 for connecting a second unit block 2b. Second to fourth unit blocks 2b to 2d are configured of: extended units 21, 22 and 23; a plurality of I/O units 11; and an end unit 12. An extended unit 20 is connected via a connection cable 31 to the extended unit 21. The extended unit 21 is connected via a connection cable 32 to the extended unit 22, and the extended unit 22 is connected via a connection cable 33 to the extended unit 23.SELECTED DRAWING: Figure 1 |
