???¦Ë?????? >???PLC????
???????????PLC????
??????????????????????????
???PLC???????????XC1?????XC2?????XC3?????XC4?????XC5????????PLC?????
???PLC XP3????
?????XP3 PLC????...
???PLC XC3????
?????XC3 PLC????...
???PLC XC2????
?????XC2 PLC????...
???PLC XC1????
?????XC1 PLC????...
- ?? 1?4?????