S7-300400 PLC寻址方式.pdf

SFB/SFC/FB/FC 9 S7-300/400 S7 CPU S7 (IEC) I CPU IB IW ID Q QB CPU QW QD M MB MW MD (T) T (C) C OPN DB DB (shared DBs) DBX FB SFB (instance DB) DBB DBW DBD OPN DI DI DIX DIB DIW DID L L LB LW LD (I/O) PIB DP PIW PID (I/O) PQB PQW PQD 10 S7-300/400 PLC 10.1 STEP7 (I/O)(M)(DB) (FB)() (Motor_A_On, ), 10.1.1 I 0.0Q 1.7PIW 256PQW 512MD 20T 15C 16DB1.DBB 10L1 0.0 10.1.2 STEP7 ’Motor_On’Q 4.0 ’Motor_On’ 10.2 16 32 32 10.2.1 * 16 16 DBFCFB16 065535 T C DBDI FBFC16 [ 16