1. S7 400CPU
S7-400 CPU System Memory (Work Memory) (Load Memory) 1-1
1 1
1 :
System Memory PII,PIQ (M) (T) (C)) ( Local data Lack)
2
(Work Memory) S7-400CPU (Code Memory) (Data) CPU CPU CPU417-
4 (6ES7 417-4XL00-0AB0 V1.1~V3.1)
CPU
A&D Service & Support Page 2-16
3 (Load Memory) ( ) RAM S7-400 (RAM Flash EPROM) (RAM Flash EPROM) RAM CPU RAM Flash Eprom RAM
CPU STEP7 “Download ” CPU CPU S7-300 CPU MMC (Work Memory) RAM (Load Memory)
2. S7-400 CPU
2.1
SIMATIC S7-400 CPU 3
1) S7 400 CPU RAM
2) S7 400 CPU Flash EPROM FEPROM
3) CPU417-4(6ES7 417-4XL00-0AB0 V1.1~V3.1) RAM
RAM Flash EPROM FEPROM
CPU ,
RAM
CPU PG
FEPROM
RAM “EXT.BATT” CPU RAM FEPROM FEPROM FEPROM CPU FEPROM CPU (Work Memory) step7 “PLC” “Download the user program to memory card” FEPROM CPU FEPROM RAM
A&D Service & Support Page 3-16
CPU CPU
UNLINKED DB.PDF
2.1.1
STEP7 “Blocks” “Object Properties” 2
1 2 2 “Blocks”
2 1
A&D Service & Support Page 4-16
2 2
2.2 S7-400 CPU CPU318-2DP RAM芯片生产
RAM CPU RAM RAM S7-400CPU RAM
64 KB 6ES7 952-0AF00-0AA0
256 KB 6ES7 952-1AH00-0AA0
1 MB 6ES7 952-1AK00-0AA0
2 MB 6ES7 952-1AL00-0AA0屋面拉条
4 MB 6ES7 952-1AM00-0AA0
8 MB 6ES7 952-1AP00-0AA0
16 MB 6ES7 952-1AS00-0AA0
CPU318-2DP
S7-300CPU RAM S7-400CPU CPU318-2DP RAM
A&D Service & Support Page 5-16
128 KB 6ES7 951-0AG00-0AA0
256 KB 6ES7 951-1AH00-0AA0
512 KB 6ES7 951-1AJ00-0AA0
1 MB 6ES7 951-1AK00-0AA0
2 MB 6ES7 951-1AL00-0AA0 RAM CPU (Load Memory) CPU Work Memory (6ES7 417-4XL00-0AB0 V1.1~V3.1 )
2.2.1 RAM
S7400-CPU RAM CPU CPU STOP RUN P ( CPU RUN P S7-400CPU RUN ) Download FB FC OB DB SDB RAM CPU RAM “EXT. BATT.” CPU RAM CPU CPU RAM
S7-400 CPU RAM RAM
1 RAM CPU
2 RAM MRES C LEAR/RESET
3 DB RAM
4 RAM PLC RAM “ ”
5 RAM “PLC>Download ” RAM RAM RAM
“Download user program to memory card ” CPU
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