Device |
PLC |
PAC |
||||
| Processor | One | Several pcs | ||||
| Processor Type | A processor | Two processor with the ability to process several multitasking | ||||
| Programming |
Ladder Logic (Ladder Diagram) |
Structured Text (Comp. Programming) |
Function Block Diagrams | Remote control | ||
| Operation | Logical sequential scanning | Multiple scanning | Control the position and movement | data transfer | Process Control | |
| Memory | Usually up to 64 thousand orders | Usually more than 320 thousand orders | ||||
| I/O | 3000 | Usually 128 thousand entries and 4000 input - analog output | ||||
| connections | Usually single connection | wide networks | Several types | Ethernet connectivity with more than 255 subtypes | ||