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(1)Оролт гаралтын тоогоор By I/O points
Оролт гаралтын портуудын тоогоор нь:
Micro: 32 I/O
Small: 256 I/O
Medium: 1024 I/O
Large: 4096 I/O
PLC-ийн ангилал
32
Monolithic constructionMonoprocessorFieldbus connection
Fixed casing
Fixed number of I/O (most of them binary)
No process computer capabilities (no MMC)
Modular construction (backplane)One- or multiprocessor systemFieldbus and LAN connection
DIN-rail
Large variety of input/output boards
Connection to serial bus
(2) Modular PLC
Compact(1)
PLC-ийн ангилал
34
Compact эсвэл modular ?
€
# I/O modules
Limit of local I/O
compact PLC
(fixed number of I/Os)
modular PLC (variable number of I/Os
field bus
extension
35
Programming languages
PLC программчлал
(1) Ladder logic диаграмм
(2) Statement list
(3) Функцийн блок диаграмм Function block
diagram
36
PLC программчлал
Statement listFunction block
Ladder diagram
The instructions are represented
by graphic symbols:
Contacts, Coils & Boxes
ladder diagram нь хамгийн
түгээмэл программчлалын хэл
37
PLC нь бусад компьютерийг бодвол төрөл бүрийн
орчин ажиллах боломжтой оролт гаралт ихтэй
Давуу тал
Siemens PLC
38
Давуу талууд:
Flexibility:
Correcting Errors:
Space efficient:
Low cost:
Testing:
Visual observation:
Number of contacts many:
Resistant character test :
Simplifies the control system components
Security :
Documentation:
Can make changes by reprogramming in seconds.
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